* fix: do not attempt to join call on doubleclick if missing permissions
* update comment
* export getPowersLevelFromMatrixEvent for usage elsewhere
* only read vc permissions when actually needed instead of reactively
* fix: do not attempt to join call on doubleclick if missing permissions
* update comment
* export getPowersLevelFromMatrixEvent for usage elsewhere
* only read vc permissions when actually needed instead of reactively