macosx: reset float-on-top when native fullscreen has already finished

This fixes issues where video window just disappears when exiting fullscreen,
only on Mavericks.

close #9814

modules/gui/macosx/Windows.m

@@ -693,8 +693,6 @@
     [NSCursor setHiddenUntilMouseMoves: NO];
     [[[VLCMainWindow sharedInstance] fsPanel] setNonActive: nil];
 
-    [[[VLCMain sharedInstance] voutController] updateWindowLevelForHelperWindows: i_originalLevel];
-    [self setLevel:i_originalLevel];
 
     if (b_dark_interface) {
         NSRect winrect;
@@ -725,6 +723,12 @@
     [self setMovableByWindowBackground: YES];
 }
 
+- (void)windowDidExitFullScreen:(NSNotification *)notification
+{
+    [[[VLCMain sharedInstance] voutController] updateWindowLevelForHelperWindows: i_originalLevel];
+    [self setLevel:i_originalLevel];
+}
+
 #pragma mark -
 #pragma mark Fullscreen Logic