Quick fixes!

A couple quick things:

• BUGFIX: prevented searching worldmap with an empty query (would overload from searching every existing material)
• BUGFIX: match filters and sensors, when programmed, would not render correctly - this is now fixed (programmed pixels should render as yellow)
• BUGFIX: fixed rendering of materials in non-terrain contexts so they should show their textures properly again
• MISC: a bit more optimization

More coming soon!