Fix mouse being grabbed even when not used

See merge request !639

The other way around this time.

This reverts commit 6c85c4e1.

Fix usage of V_GetColor

See merge request !638

Use GCC 8.1 for AppVeyor 64-bit builds

See merge request !624

Add clipboard functionality to the Connect via IP textbox.

See merge request !597

I was using V_GetColor in a lot of places I shouldn't have, making the game look wrong with a non-default colour profile.
Though, I left R_RainbowColormap alone.

Fix major issue

See merge request !625

Remove Direct Draw from AppVeyor config

See merge request !622

Do not save netgame-synced console variables

See merge request !623

Let the mouse move freely when a menu is open or game is paused

See merge request !617

This is a bad thing to do, because if you join a server,
your game will save the host's settings.

This reverts commit 17636ccc.

NOHW V.S. Renderer Switching

See merge request !609