Fix and Improve TerrainPicking#1049

Merged

stephengold merged 8 commits intojMonkeyEngine:masterfrom

MeFisto94:fix-terrain-picking

Sep 16, 2019

Commits on Mar 19, 2019

Fix TerrainPicking by not adding "ghost" collisions to the CollisionResults (which weren't removed).
MeFisto94
committed

Commits on Mar 29, 2019

Commits on Mar 30, 2019

Try to fix Travis Build
MeFisto94
committed

Commits on Mar 31, 2019

Fixed a Regression which occurred due to Multi Collision Handling:
MeFisto94
committed