Ensure WWindow is properly supported.

[Nielsbishere]

This means it properly cleans up a physical window and properties such as min/max window size can be defined as well.

• [x] Fix minimize
• [x] Test keyboard input
• [x] Test mouse
• [x] Reset keys on unfocus
• [x] Min/max window size
• [x] Test resizing
• [x] Test device adding
• [x] Test device removing
• [x] Test if creation error works properly
• [x] Test fullscreen
• [x] Implement fullscreen button
• [x] Fullscreen should remember previous size to go back to windowed mode
• [x] "Raytracing test" should be using a job system to allow rendering each frame.
• [x] "Raytracing test" should be testing mouse/keyboard input.