The fullscreen guis pretend to be 640x480 internally, also for the mouse
cursor position. So adding the actually moved pixels (when playing the
game at a higher resolution) to the GUIs cursor position makes it move
too fast.
To fix that I detect (hopefully that check is reliable!) if the
idUserInterfaceLocal instance is a fullscreen GUI and if so scale the
reported mouse moved pixels with 640/actual_window_width and
480/actual_window_height.
Don't include the lazy precompiled.h everywhere, only what's
required for the compilation unit.
platform.h needs to be included instead to provide all essential
defines and types.
All includes use the relative path to the neo or the game
specific root.
Move all idlib related includes from idlib/Lib.h to precompiled.h.
precompiled.h still exists for the MFC stuff in tools/.
Add some missing header guards.
variable set but not used
Removes some CollisionModel code under _DEBUG which was probably a
leftover, since it was completely useless (its done later anyways).
