Fix bug: on 10.7+, lines were drawn through the subviews while animating the window resize.
Fix bug: on 10.7+, lines were drawn through the subviews while animating the window resize.

While animating, turn off the window's preservesContentDuringLiveResize flag.

krevis/MIDIApps,krevis/MIDIApps,krevis/MIDIApps,DouglasHeriot/MIDIApps,DouglasHeriot/MIDIApps,DouglasHeriot/MIDIApps,krevis/MIDIApps,krevis/MIDIApps