Lidar Trees Release Candidate

Resolves some issues with the 0.2.0 release:

Now supports both MS paint red colors in case of misclick or bad eyes

Lidar trees will respect the mask and not populate in red areas. This should go easier on the resource meter.

I've stopped adding the low detail background automatically, I think for some users with very large courses, it causes issues. It's relatively easy to add with the terrain flatten tool.

Fix a few small issues and code crashes, especially related around first import after the tree update or trying to make a flat OSM course

And improving the speed of the OSM import stage since we're doing a lot more with it now.