Do not serialize the Selected property in events
Fix dipose in canvases when Objects is null
Disconnect all signals when closing the player
Start and close the frames capturer for each project change
Enable back editing events properties
Reset team tagger selection after adding a new event
Rename more categories to EventType and plays to Event
Show times with the hour digit

This fixes a problem with the player rescalling
when the time label has different number of digits
Remove tests until they are back