#1246 Copying events doesn't always work

[Amirai]

Sometimes when working in the event editor, pressing the copy button doesn't actually copy what's selected. This happens frequently when going back and forth between copying text in expressions, conditions, actions and events.

To make sure it copies, I have to copy something of a different type first -like if I want to copy an event, first I copy some text in an expression. Then when I select the event, paste is grayed out. That way, I know if it's copied properly because paste becomes ungreyed.