Sigil-2.6.2

Sigil 2.6.2 is a mixture of bugfixes and new features.

enable use of the fetch api in Sigil internal "sigil:" scheme
create PreviewFileDialog to append thumbnail previews for images and selected text files when used in non-native dialog mode. Leave native dialog mode untouched.
added environment variable to revert to previous Sigil behavior of using native file dialog for "Add Existing": SIGIL_FORCE_NATIVE_FILE_DIALOG=1 (Note: due to the crash-happy nature of using native file dialogs in Qt, you are on your own if any issues arise from enabling this).
added environment variable to turn off use of custom icons to make "Add Existing ..." work better over networked storage with lots of files: SIGIL_NO_CUSTOM_DIRECTORY_ICONS=1 (only used with non-native file dialog).
BookBrowser now has a "View Image" pop-up menu item that allows users to see what any image (SVG included) without having to open a full Tab
make CV understand the media-types of the file it is editing so that it can better create pop-up menu items like "View Image" when editing an SVG
add support for "env-vars.txt" in Sigil Prefs folder, uses VARIABLE=VALUE one per line
completely revamped the AppImage CI builds to use Docker images

Sigil 2.6.2 is a mixture of bugfixes and new features.

enable use of the fetch api in Sigil internal "sigil:" scheme
create PreviewFileDialog to append thumbnail previews for images and selected text files when used in non-native dialog mode. Leave native dialog mode untouched.
added environment variable to revert to previous Sigil behavior of using native file dialog for "Add Existing": SIGIL_FORCE_NATIVE_FILE_DIALOG=1 (Note: due to the crash-happy nature of using native file dialogs in Qt, you are on your own if any issues arise from enabling this).
added environment variable to turn off use of custom icons to make "Add Existing ..." work better over networked storage with lots of files: SIGIL_NO_CUSTOM_DIRECTORY_ICONS=1 (only used with non-native file dialog).
BookBrowser now has a "View Image" pop-up menu item that allows users to see what any image (SVG included) without having to open a full Tab
make CV understand the media-types of the file it is editing so that it can better create pop-up menu items like "View Image" when editing an SVG
add support for "env-vars.txt" in Sigil Prefs folder, uses VARIABLE=VALUE one per line
completely revamped the AppImage CI builds to use Docker images

Sigil