Local Calendar - Add filter and make the calendar more attractive and easier to use

Hi,
It would be great to have the possibility to use a filter if using a lot of local calendars!
For example, a button to select and unselect all calendars would be a nice help for selecting one or more specific calendars, without the need to unselect all calendars manualy one by one!
So I could unselect all and only select the one I need…
Another, mor complex idea, would be to add a live filter bar.
The idea would be, to enter for example the word “room” in the filter box, and only the calendars named “… room…” will be shown.
I think there will be a lot of possibilities, to make the lokal calendar more attractive and easier to use…
many thanks