winemac.drv: Allow cycling of windows with Cmd+`.

We already set up the Window menu and set the relevant bits in
collectionBehavior, but windows must respond YES to
-canBecomeKeyWindow in order to actually be activated by Cmd+`
window cycling.

Signed-off-by: Tim Clem <tclem@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/winemac.drv/cocoa_window.m

@@ -2358,7 +2358,11 @@ - (BOOL) canBecomeKeyWindow
     {
         if (causing_becomeKeyWindow == self) return YES;
         if (self.disabled || self.noActivate) return NO;
-        return [self isKeyWindow];
+        if ([self isKeyWindow]) return YES;
+
+        // If a window's collectionBehavior says it participates in cycling,
+        // it must return YES from this method to actually be eligible.
+        return ![self isExcludedFromWindowsMenu];
     }
 
     - (BOOL) canBecomeMainWindow