fix: make BrowserWindow#isFocused() return false when blur() is called

The isFocused() method on macOS works by checking if the selected
BrowserWindow is a key window. Unfortunately doesn't work well with
focus() and blur() because these weren't calling any macOS APIs that
would change the key status of the window. Hence, this changes the
implementation of blur() to call orderOut first, which removes the key
status of the window. Then when the orderBack function is called, it
moves the window to the back of its level in the screen list, without
changing the key window.

Fixes: #33732
Signed-off-by: Darshan Sen <raisinten@gmail.com>

shell/browser/native_window_mac.mm

@@ -506,6 +506,7 @@ void ViewDidMoveToSuperview(NSView* self, SEL _cmd) {
     [[NSApplication sharedApplication] activateIgnoringOtherApps:NO];
     [window_ makeKeyAndOrderFront:nil];
   } else {
+    [window_ orderOut:nil];
     [window_ orderBack:nil];
   }
 }

spec-main/api-browser-window-spec.ts

@@ -763,7 +763,12 @@ describe('BrowserWindow module', () => {
     });
 
     describe('BrowserWindow.blur()', () => {
-      it('removes focus from window', () => {
+      it('removes focus from window', async () => {
+        const show = emittedOnce(w, 'show');
+        w.show();
+        await show;
+        w.focus();
+        expect(w.isFocused()).to.equal(true);
         w.blur();
         expect(w.isFocused()).to.equal(false);
       });