JBR-2879 Big Sur: Opening project in new window results in opening project in another tab

Disabled Tabbing mode for all NSWindows

(cherry picked from commit 8cb0377a31)

src/java.desktop/macosx/native/libawt_lwawt/awt/AWTWindow.m

@@ -115,6 +115,10 @@ static NSPoint lastTopLeftPoint;
     [super becomeKeyWindow];                                    \
     [(AWTWindow*)[self delegate] becomeKeyWindow];              \
 }                                                               \
+                                                                \
+- (NSWindowTabbingMode)tabbingMode {                            \
+    return NSWindowTabbingModeDisallowed;                       \
+}
 
 @implementation AWTWindow_Normal
 AWT_NS_WINDOW_IMPLEMENTATION