Load score screen should not appear when double-clicking a document
I have my preferences set to "start empty" on launch. This causes the Load/Create screen to appear on launch.
That is fine if I launch the app clean, but if I launch the app by clicking on a MuseScore document, I expect that document to appear without the Load/Create screen (I just loaded a document).
So, the Load/Create screen should only appear if there is no document loaded at launch.