* added restart button
   > - added restart button to the main app's UI and the notification actions,
   > - this button will appear when the timeout is started and counting down,
   > - it enables restarting the count down of the currently selected timeout
   > - without having to cycle through all timeouts
   > - added widget preview image for launchers that don't support widget
   > - preview layout

**Full Changelog**: https://github.com/abdalmoniem/Caffeinate/compare/v1.7.0...v1.7.1
