Hide calendar checkbox entirely in options when unselected.
Hide calendar checkbox entirely in options when unselected.

The previous one at 0.2 opacity made it hard to see if a calendar was
selected or not.

thanhpd/google-calendar-crx,ChaosEngine/google-calendar-crx,Steindi01/google-calendar-crx,YOTOV-LIMITED/google-calendar-crx,bonaime/google-calendar-crx,CooperLuan/google-calendar-crx,CooperLuan/google-calendar-crx,manastungare/google-calendar-crx,bonaime/google-calendar-crx,YOTOV-LIMITED/google-calendar-crx,Steindi01/google-calendar-crx,manastungare/google-calendar-crx,thanhpd/google-calendar-crx,ChaosEngine/google-calendar-crx