Cocoa plugin - fix obscured/mapped/unmapped logic

NSWindow setStyleMask can call viewDidMoveToWindow,
while setting the mask, view can have window == nil and we call 'obscure'
on this view's platform window/QWindow == 'unmapping' it.
As a result, it can happen that a child view (for example, QGLWidget's view)
never gets mapped back. This patch tries to limit this special
obscure/expose logic by the exact views it was introduced for
(c7bd85e97df1b188bcbd4a2a511313d221c5bb83, QTBUG-19840).

Change-Id: I4cc7a6b1bd3e34741ad50c2e0d2a2add242b28e4
Task-number: QTBUG-41701
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>

0 files changed, 0 insertions, 0 deletions