Window-Snapping needs a second invocation of Win+LeftArrow

That bug with Window Snapping feature is nothing new, it existed since I had a look at the feature for the first time during 0.4.12dev'ing.

Reproduction steps

• open a filebrowser window (another app like rapps would work as well)
• make sure the window is in "restored state" and active
• Press Winkey+UpArrow to maximize
• Press Winkey+DownArrow to return into restored state
• Press Winkey+Left with the aim to snap it to 50% leftside

Expected result
It should snap 50% leftside

Observed result
Nothing will happen during first invocation of Winkey+Left,
but if user presses Winkey+Left a second time, then the intended operation takes place

0.4.14-dev-189-g3b2f158-WindowSnap.webm
0.4.14-dev-189-g3b2f158-WindowSnap.log (shows nothing of interest)