Making a standalone build with Capture Display selected as Mac Fullscreen Mode does not to switch to fullscreen during runtime.

1. What happened

Made a standalone build with Capture Display selected as Mac Fullscreen Mode, launched the game in window mode. Using the in-game button to enter fullscreen does not work (Game stays windowed, and UI becomes unresponsive) until the windowed mode is entered again.

2. How we can reproduce it using the example you attached

* Open the attached project;
* Build for OSX Standalone and player build settings select "Capture Display" in the Mac Fullscreen Mode;
* Run application in windowed mode;
* Press the in-game "Fullscreen" button to enter fullscreen;
* See that application did not go into fullscreen and the UI (e.g. Enter Text field) became unresponsive except for the "Windowed" button.

No regression: Checked with 5.3.3f1 and 5.3.3p2, both work the same.