Changelog:
- Ensure picture directory is an absolute path.
- Add ability to flip image during preview.
- Convert appdata file to metainfo and add missing info.
- Display remaining shot count & ETA in repeat shooter plugin.
- Remove use of deprecated GObject macros.
- Remove use of deprecated GLib APIs.
- Convert to use GObject macros for declaring boilerplate.
- Force a default filename pattern if setting is invalid.
- Validate filename pattern when updating preferences.
- Rename desktop file and icon file to match application ID.
- Add ability to render text mesages over image.
- Add a countdown timer for photobox plugin capture.
- Disable context menu in image browser when photobox plugin is active.
- Run live view when counting down to capturein photobox plugin.
- Fix crash releasing popup windows.
- Add context menu option for opening popup image window.
- Drop drag support for opening popup image window.
- Display greeting when opening popup image window.
- Display greeting when entering photobox plugin.
Fixes T9368