Add automatic update support, probably via a system like Squirrel. This should support three modes in settings:

1. Update automatically (default)
2. Notify of new updates and download on demand
3. Disabled

and allow opting in to prerelease updates (mostly for testing).

Image tagging feature requires:

• Tables to store tags and file/tag associations.
• Ability to add and remove tags to files.
• Ability to filter by tags.
  • Autosuggest tags in search box.
  • Autosuggest should still allow non-tag values in search box.

Support loading and displaying animated PNGs similar to animated GIFs.

Support the webp image format.

The file list should optionally show thumbnails of each file. This should be disableable in the settings. This should be designed to minimize performance impact, and should be tested on very large (1000+ image) directories.

Title bar commands should dynamically be moved to a ... menu as necessary to ensure they are always accessible and the title bar always has room to drag the window. This should work similarly to a UWP command bar.

Priority of commands from should be as follows, from always visible (1) to first hidden (n):

1. File list
2. Prev/Next
3. Slideshow
4. Rating
5. Fit ...
6. Open
7. Settings

The current icon doesn't show well against the default dark windows toolbar, add color or more contrast.

The app shouldn't crash, and should disable features like rating that can't be used.

Add playback controls when displaying animated formats. The controls should include:

• Play
• Pause
• Restart
• Step forward/backward one frame

3rd party dependencies should be credited on an about screen. Currently this screen will be shown on the right of the settings view.