Adjust notification label effects

TODO item done in this commit (exported by TODO in Python):
  (TODO grabber) 000: [DONE] Add padding to notification labels, maybe also border radius.
  (TODO grabber) 011: [DONE] Change height of notification labels for longer text.
  (TODO grabber) 012: [DONE] Calculated notification label width doesn't fit the pass grid. 1px difference. Need change.