- fixed a crash in the 2D drawer when two consecutively allocated vertex buffers had the same address. Strangely this only occured with Exhumed but not the other games
- fixed Exhumed crashing with sound disabled.
- draw fullscreen blends below the console.
- moved all mouse event processing out of the SDL backend to D_PostEvent.
- removed all remaining code for dealing with mouse buttons directly.
Not only is this a deprecated feature - it also does not work right when complex lighting is at play, it must be done in the shader to get proper results.
