main/postmarketos-tweaks: upgrade to 0.8.0
- Support setting the gnome sound theme
- Added a sound theme editor for a Custom sound theme
- Fixed the requirement to tap the navigation twice on the first run on mobile layout
- The subtitle is cleared when pressing the back button
- Fixed a bug in the osk-sdl config parser where booleans were always true
- Added StartupNotify for better integrating into Phosh
- Added a bit more documentation for the soundtheme and symlink backend