tke Files

### New

- Added support for function and variable syntax highlighting.
- Added an uninstall script for Linux environments.
- Added Terraform and TypeScript syntax highlighters.
- Added `api::menu::get_value` API procedure which returns the current value of a checkbutton or radiobutton menu item.
- Added advanced preference option to specify a default directory for exporting plugins.
- Added support for using globbed file/directory names on the command-line for Windows users.
- Added Plugins menu command to display the plugin source directory in the sidebar when in development mode.
- Added `api::plugin::get_header_info` API function.
- Added support for new plugin header fields: `display_name`, `website` and `category`.
- Added the ability to clear the currently selected shortcut in the Shortcuts preference pane by hitting the `Delete` key.
- Added copy (Control-c), cut (Control-x) and paste (Control-y) keyboard shortcuts to all entry, combobox and spinbox widgets.
- Added support for changing the ordering display of files in the sidebar with the keyboard when manual ordering is enabled for a directory (Alt-Up/Down will move all selected files up/down, respectively).
- Added preference option in Find panel that controls whether the find or find/replace panels are automatically closed when keyboard focus is given back to the editing buffer.
- Added menu indicator in syntax menus when those menus display syntaxes using alphabetical categorization to help the user find the currently displayed syntax.
- Added new `add_shortcut` and `open_glob` plugins.
- Added support for setting a proxy server/port in the `Advanced` preferences panel.
- Added ctext support for setting and hiding syntax highlighted with meta characters.

### Changes

- Changed the default font size of the command launcher text widget from 6 to 10 to improve readability.
- Moved the text widget in the command launcher to be displayed below results to improve readability.
- Updated built-in themes to provide color schemes for function/variable highlighting.
- Updated all syntax descriptions to perform function and/or variable highlighting.
- Minor UI improvements made to the About window.
- Renamed `api::get_install_directory` to `api::get_plugin_source_directory`.
- Renamed `api::get_plugin_directory` to `api::get_plugin_data_directory`.
- Debug logfiles are no longer added to the recently opened list.
- Improved command-line help information and formatting.
- Enhanced macOS installation instructions to include the need for Tcl/Tk 8.6 installation.
- Improved translation file checker.
- Enhanced PluginHeader syntax description to allow the user to right-click on the category field value to change it to a different, supported value.
- Improved plugin export facility to allow the user to change the version number (with combobox suggestions) and provide release notes.
- Increased width of shortcuts search field.
- Removed todo plugin items, markers, favorites and reference documents from the Shortcuts preferences menu.
- Changed/Fixes keyboard traversal issues in the shortcuts preferences menu.
- Improved the display of plugin names within the UI to improve readability.
- Updated ptwidgets library.
- Removed the strings `Windows`, `Unix` and `Emmet` from translations as they are proper names.
- Improved automated translation utility.
- Changed the session switcher and deletion submenus to display the current session.
- Improved HTML display in application updater.
- Removed support for watermark strings when creating plugin preference entry widgets.
- Improved Markdown syntax highlighting to consider backslash characters as meta characters that can be hidden via the View menu.
- Changed Markdown link syntax to treat the URL references as hideable text.
- When a directory is added to the sidebar, it is now automatically selected and made visible.
- Updated all copyright information to include 2019.
- Enhanced e_menu and doctest plugins.
- Updated translations.
- Updated User Guide.
- Updated Developer Guide.

### Bug Fixes

- Fixed missing/incorrect language reference document links in syntax definition files.
- Fixed issue with left-clicking the mouse when Vim mode is disabled (UI updates were not occurring).
- Fixed About window sizing issue on different platforms that could cause UI elements to not be displayed.
- Fixed clipboard history issue where inserting from clipboard history did not update the order of elements in the clipboard history.
- Fixed issues with creating a new directory from the sidebar using an absolute pathname.
- Fixed sidebar issue where a newly created directory might not be immediately displayed.
- Fixed potential issue with trashing a sidebar item.
- Fixed issue with Linux installation script that can cause in-app updates to no longer work.
- Fixed and improved code support for moving the cursor to the next or previous start/end of a word that could cause the application to crash.
- Fixed issues with tab asterisk display when editing in non-Vim mode.
- Fixed redo issue when it caused a line to be deleted.
- Fixed issue when a tab is modified and the application is exited, TKE will not prompt the user if a save is needed.
- Fixed issue with `Sort By` sidebar submenu activation status in Linux environments.
- Fixed issues with using parenthesis in exact searches.
- Fixed issue that could cause the `Todo` plugin to crash the application if a todo name contained colon characters.
- Fixed issue with the shortcuts column width when a menu path exceeds the width of the preferences window.
- Fixed permission issues with exporting themes/bundles.
- Fixed issue where the editing buffer was disabled from editing after a find/replace operation took place.
- Fixed issue where plugin I/O operations would not complete when the plugin called `close` on a file channel.
- Fixed issue where attempting to mark a blank line in a file would not display the mark (blank lines are no longer markable).
- Fixed issue where a line being named with a mark could be cleared before the mark was named.
- Fixed issue where a plugin preference pane required the dropdown menu to be selected twice before showing the panel.
- Fixed keyboard focus issue in Shortcuts preference panel where after a shortcut was edited, the table was not receiving input focus.
- Fixed issues where keyboard shortcuts were incorrectly activatable when keyboard focus is in a different window or widget.
- Fixed issue where the find and find/replace panels could be displayed on top of each other (only one should be displayed at a time).
- Fixed an issue calculating the plugin directory when exporting a file.
- Fixed button width display issue in preference window when non-English translations are used.
- Fixed initial startup wizard layout when non-English translations are used.
- Fixed issues with the display of the syntax selection menu when they are sorted within alphabetic submens.
- Fixed display issues with the `dir_popup`, `root_popup` and `file_popup` plugin actions.
- Fixed issue where multiple startup windows could be displayed simultaneously.
- Fixed issue where clicking on the window close button of the startup window did not exit the application.
- Fixed issue where plugin header data could get stored incorrectly.
- Fixed issues around using the tablelist widget in plugins.
- Fixed issue where the `.` and `..` directory items on Linux and macOS could be displayed in the sidebar if the `Show hidden files` preference option was set.
- Fixed display of cursor when a search panel was closed.
- Fixed issue where changing snippet options in a named session was not allowing the preference changes to take effect.
- Fixed cursor snippet insertion string in snippet editor insert menu.
- Fixed issue with http downloader procedure on Windows.
- Fixed issues with preference entry widgets not displaying their values and saving their values properly.
- Fixed issues with sidebar menu plugins with submenus.
- Fixed issues with theme exporter displaying an error message.
- Fixed Markdown display issues with `Show Installed` plugin menu output by placing backslashes in front of Markdown characters that come from the plugin header where Markdown syntax is not supported.
- Fixed PluginHeader syntax description to ignore hashtags that are not at the beginning of a line.
- Fixed theming issues with the code editing widgets within the preferences window.
- Fixed preference window display issue when the current panel is the plugins panel and we change the session/language menubutton value.
- Fixed snippet parsing issue that would not allow snippet variables to be used in snippet shell commands.
- Fixed issue where the sidebar did not show a newly added file to a directory.
- Fixed issue where a global preference that was changed when we are in a named session did not cause that preference change to be immediately reflected in the tool.
- Fixed issue with zipping themes/bundles in Windows.
- Fixed issue where preferences were being saved to session preferences that should not be there.
- Fixed issue where closing the preference window would incorrectly prompt the user to save to the session/global preferences.