- Show placeholders until the image is loaded because timeout can be very long and missing profile pictures and video thumbnails make app inconvenient to use
- Adapt profile picture and video thumbnail placeholders to light theme
- Replace profile picture and video thumbnail placeholders with vector graphics
* Required for SubscriptionFragment (otherwise the PopUp-menu uses half of the screen)
* Size reduction
* Fixed/Improved some images:
* Bandcamp: Was facing in the wrong direction and used an incorrect logo
* Media CCC: Update logo
* YT: Added NewPipe logo so that it's not just a rectangle
For all manually-created images PNG have been kept.
- rename all icon attrs to have a `ic_` prefix
- always use `_24dp` icons, because there is no real difference, since they are vector drawables
- always use the original name found on material.io for icon drawables, as to not create confusion and possibly duplicates. Icon names can still be different from real drawable names, though I have made some of them compliant to this or maybe more meaningul.
- remove duplicate `getIconByAttr()` in ThemeHelper (use `resolveResourceIdFromAttr()`
- use standard icons for `expand_more` and `expand_less` instead of triangles
- use `play_button_outline` instead of custom PNG as play button in VideoDetailFragment (questionable, as there is no shadow anymore)
- Every service now have its own colors
- Fix bug navigation button and backstack count
- Fix and themed properly the icons and colors of the main fragment tabs
- Re-organized the styles and colors (too much in one file)
