Default keyboard behaviour on Windows

[mmnich]

I am using ipe 7.2.29 on Windows. Working with the mouse to move objects in ipe is excellent, but several actions could be made more efficient to work with (in my humble opinion) if they were supported by standard keyboard shortcuts. Ipe already supports several standard keyboard shortcuts such as [Ctrl] + [X] for cutting objects. It would be great if some other ones could be added as well. Especially, the default behaviour under Windows is that a right-click of the mouse can be simulated by pressing [Shift] + [F10]; adding this shortcut would be very helpful to quickly open the context menu for the currently selected object.