A DESCRIPTION OF THE PROBLEM :
In most applications the behaviour is the following:
- You press the mouse button on a menu bar menu and do not release it
- If you now move the mouse with pressed button, to a different menu, the other menu opens
- If you move the mouse with pressed button, over entries in the menu, the menu entry gets selected or sub-menu opened
- If you release the mouse button while some menu entry is selected, the entry gets activated and executed

With JavaFX applications this is by default not the case.
This feels awkward and it would be nice if JavaFX would support this natively by default.