Adds colored hazard concrete and rectangular marker tools to allow easy factory planning.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Title. Having both turned on results in the following crash on startup:
Error Util.cpp:57: Sprite outside of "VersepellesChunkMarkers/graphics/tiles/blue-hazard-concrete/blue-hazard-concrete-left-o.png" (at 63, 31, size 1x1 of 32x32).
Having only one turned on does not cause this crash.
