constrain maximization/restorage for fixed ratio

when eg. vertically maximizing a cinemascope video in mplayer
it would horizontally exceed the (16:9) screen, so this
case is translated to a full maximization (effectively binding
the window into screen dimensions)

also, when restoring such video from a horizontal maximization
the restore would usually keep the height (thus breaking the
window aspect) so pass geom_restore -> restore through adjustedSize()

REVIEW: 108702