Remove Exclusive fullscreen setting/mode and use borderless as the default fullscreen mode

[vilbeyli]

Reasonsing

• When Exclusive fullscreen changes the resolution, the display mode is changed
• Alt+Tab transitions are slow
• Application exit is slow due to SetFullscreen() call
• There's no added benefit in supporting exclusive fullscreen
• The only time the user will have to do extra work is when the monitor has different refresh rate support for different resolutions.
  • Example
    • 2160p@60FPS
    • 1440p@144FPS
  • The user would have to change the display settings themselves before launching the app

Also : https://devblogs.microsoft.com/directx/demystifying-full-screen-optimizations/