**Fix**
 - Fix the size of the marker in the stopwatch circle;

**Improvements**
 - Add the ability to change the accent color;
 - Add the ability to hide/display card backgrounds (does not apply to settings);
 - Add the ability to hide/display background borders (does not apply to settings);
 - Add the ability to enable/disable vibrations to some UI elements (only devices equipped with a vibrator are affected);
 - Vibrations are added to the settings switches (only devices equipped with a vibrator are affected);
 - Remove essential permissions check when opening the app: now, if essential permissions are not granted, a message appears at the top of the settings;
 - Screenshots updated (mainly for F-Droid) as discussed here: https://github.com/BlackyHawky/Clock/discussions/23#discussioncomment-9346357