[Bug]: Fullscreen is preserved

### Preflight Checklist - [x] I have searched the [issue tracker](https://www.github.com/ollm/OpenComic/issues) for a bug report that matches the one I want to file, without success. ### OpenComic Version OpenComic-Nightly-v1.6.6-dfe9777 ### Operating System Win10 ### Installed via .exe ### Steps to reproduce 1. Open OpenComic (reader or library, no matter) 2. F11 3. Alt+F4 4. Reopen OpenComic ### Expected Behavior Window is not in fullscreen mode ### Actual Behavior OpenComic preserve fullscreen mode between launches. Start reading in full screen is disabled in settings. ### Error message _No response_ ### Additional Information Related: https://github.com/ollm/OpenComic/issues/199 ### Sample file _No response_