Re-grab input when automatic capture is enabled

Make the window auto-capture the mouse again in full screen when it regains focus (for instance after swiping back to the UTM app).

fixes #6242

Platform/macOS/Display/VMDisplayQemuMetalWindowController.swift

@@ -403,19 +403,24 @@ extension VMDisplayQemuMetalWindowController {
     func windowDidEnterFullScreen(_ notification: Notification) {
         isFullScreen = true
         if isFullScreenAutoCapture {
-            captureMouseToolbarButton.state = .on
             captureMouse()
         }
     }
 
     func windowDidExitFullScreen(_ notification: Notification) {
         isFullScreen = false
         if isFullScreenAutoCapture {
-            captureMouseToolbarButton.state = .off
             releaseMouse()
         }
     }
 
+    override func windowDidBecomeKey(_ notification: Notification) {
+        if isFullScreen && isFullScreenAutoCapture {
+            captureMouse()
+        }
+        super.windowDidBecomeKey(notification)
+    }
+
     override func windowDidResignKey(_ notification: Notification) {
         releaseMouse()
         super.windowDidResignKey(notification)