Hello team

Seems like gnome-calendar is stuck for several seconds during initial startup.
Or at least I can't really move the the application window for something like 8
seconds, until all calendars are refreshed.

I have relatively simple setup
* personal gmail calendar with one calendar oly
* office365 with 3 calendar (openSUSE Rel-eng, team one, and personal one).

Can this be addressed in a way that the "waiting for sync" part doesn't block
the entire application? It's perfectly expected not to fully visualize calendar
part, it's just that app should not be stuck.

Thank you