fixed window restore after minimizing when clicking the task bar or using alt-tab
fixed r_mode 1 on secondary monitors
fixed in_mouse 2 input on secondary monitors
fixed the cursor sometimes staying visible and unclipped when restoring the window
use the "premake" tool from the cnq3tools repo with
"--quake3dir=<q3dir>" to generate a VS sln and gcc makefiles
this changeset also removes the "clever" handling of fullscreen/windowed
changes which didn't actually work and just broke windowed mode