Open requested to merge stly/ase:move-gui-structure into master
In ase-gui: Allow the entire structure to be moved using shift + right mouse button (and then move the mouse)
It contains an odd line to determine from a tkinter event that shift is pressed. Therefore it needs to be tested on Mac also.
Update: It still has the strange behavior on Mac, where the structure moves much more than the mouse is moved. This will be fixed eventually.