TODO, which will get actually done
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- TeeWorlds: infinite loop while trying to enter chat text with gamepad.

- TeeWorlds: navigate UI with gamepad.

- OpenArena: tapping and holding joystick will disable Jump button.

- OpenArena: cardboard VR mode.

- SDL: CompatibilityHacksForceScreenUpdate=y does not redraw screen when invoking from background.

- SDL: implement SDL_GL_LoadLibrary() / SDL_GL_GetProcAddress() / SDL_GL_SetAttribute() / SDL_GL_GetAttribute().

- SDL: CompatibilityHacksForceScreenUpdate=y does not redraw screen after putting to background and restoring.

- USB Keyboard: options for camera feed size and for redefining remote menu hotkey, control mouse with gyroscope.

- OpenTTD: 24bpp color mode + 32bpp blitter in SDL menu.

- OpenTTD: multiplayer chat GUI is broken.

- SDL: add option for non-fullscreen non-immersive mode.

- UQM HD: add fonts from http://mosc-portal.bursa.ru/showthread.php?t=206 and switch back to joystick controls, set 4:3 aspect ratio as default.