Shortcut for toggling calendars on and off: Number keys

The ability to assign at least 2 number keys to each calendar to be able to toggle on and off those calendars separately or in combination. Morgen calendar has this feature if you would like to have a reference.

Assigning shortcuts in the menu attached. e.g,

"Dummy Calendar 1" would show/hide when "1" is pressed

"Dummy Calendar 2" would show/hide when "2" is pressed

"Dummy Calendar 4" would show/hide when "1" OR "3" is pressed