- Fix a textedit issue with Cocoa

(cherry picked from commit 464bae7)

Author: couet

graf2d/cocoa/src/QuartzWindow.mm

@@ -2612,6 +2612,18 @@ - (BOOL) acceptsCrossingEvents : (unsigned) eventMask
    return accepts;
 }
 
+//______________________________________________________________________________
+- (void)didAddSubview:(NSView *)subview
+{
+    self.clipsToBounds = YES;
+}
+
+//______________________________________________________________________________
+- (void)willRemoveSubview:(NSView *)subview
+{
+    self.clipsToBounds = self.subviews.count > 1;
+}
+
 //______________________________________________________________________________
 - (void) addChild : (NSView<X11Window> *) child
 {