[e-users] theme experiment - try a window wobble/jiggle when focused

Hi

I have tried the last commit and I am going to remove it. On a laptop
screen all the windows jiggling even the popup windows , I find it
unpleasant for the eyes and I wear glasses. At a moment if you put the
cursor on the cross on the right upper side the window doesn't stop
shaking. As you write it's an experiment  but if you want to include
it could you provide an option to disable/enable this feature.

Best regards

Dania