Tweaks for the new DX9 renderer

I removed most of the Z-BIAS / DEPTHBIAS hacks except for those cases in which they definitely were required for my system in DX9 (incorrect ordered if not applied)

Fixed issues with Dx9:
1) Z-Fighting of room wireframe (bloody hack to close gaps on edges) with actualy room ("black lines" on some walls/floors should be gone)
2) Z-ordering issue with objects<->room (the depthbias hack moved them too much off their real position)

Note: This also reverts the light-change here:
https://github.com/skittles1/Meridian59_103/commit/06441a218787c7a1c12e42e77741d347c7fe4ca7

New possible issues with this:
1) Names may be more likely (partially) covered by the room elements