maximization goes wrong with MS Windows clients

[totaam]

Here with Firefox:

client   4 @06.514 configure event: current size=(1013, 645), new size=(16384, 150), backing=gtk3.CairoBacking(ImageSurface(1013, 645) : size=(1013, 645), render_size=(1013, 645)), iconified=False
window client properties updates: {'encoding.render-size': (16384, 150)}

This is very similar to #2714.
It seems that the new maximized dimension is 16384 - which is high enough to cause problems and too low to trigger the counter measures we added previously.

$ xpra info | grep size-constraints
windows.10.size-constraints.base-size=(563, 150)
windows.10.size-constraints.gravity=1
windows.10.size-constraints.maximum-size=(16384, 16384)
windows.10.size-constraints.minimum-size=(563, 150)

[totaam]

Same fix as #2714