[WIP] GLFW redesign

[dimitre]

this is an experimental PR

[dimitre]

now it is possible to select which screens will the window cover in fullscreen like:

	settings.fullscreenDisplays = { 0, 1, 2 };
	settings.fullscreenDisplays = { 1, 2 };
	settings.fullscreenDisplays = { 1, 3 };