Jonas Jenwald 54f45dc935 Don't dispatch a "doc/Open" event in the sandbox when creating it failed
There's really no point, as far as I can tell, to attempt to dispatch an event in a non-existent sandbox. Generally speaking, even trying to do this *could* possibly even lead to errors in some cases.

Furthermore, utilize optional chaining to simplify some `dispatchEventInSandbox` calls throughout the viewer.

Finally, replace superfluous `return` statements with `break` in the switch-statement in the `updateFromSandbox` event-handler.
2020-12-19 09:13:12 +01:00
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