[GREENFOOT-331] Improve Scenario open behaviour (MacOS)
When Greenfoot is started by double clicking a scenario's 'project.greenfoot' file, the last open project is also opened. In this case, it shouldn't.
It is especially odd when the previous scenario does not exist at it's location anymore \- then an empty window is opened, for which the 'Close' keyboard shortcut is disabled.
Solution: do not open last used project when Greenfoot is started with a scenario.
Issue metadata
- Issue type: Task
- Priority: Low
- Fix versions: 2.1.1