merging new commits from master

- Updated app artworks
- Fixed a bug where the text style of `Unknown artist` is not consistent across different pages.
- Fixed a bug where scrolling to the page section is not working.
- Added a fix for flickering issues in notifications with progress indicators.
- Fixed a bug where `Update token` button in Musixmatch Settings prompt is not disabled even though the typed token is the same saved token.
- Fixed a bug where `Show token` button is not disabled when opening Musixmatch Settings prompt with a previously saved token.
- Fixed a bug where clicking `Adjust Playback Speed` context menu option doesn't point you to the correct section of Settings.
- Increased the brightness of Song Card artworks.