Console variables foliage.ForceLOD and r.ForceLOD do not operate correctly for Foliage

There also does not appear to be any code to handle r.ForceLOD for HISMs.

• Launch the game with the project in the UDN ticket below.
• Type the command foliage.ForceLOD 0 (foliage in the example have LOD 0 and 1 only)
• See the result : the LOD 0 of the bushes (with dithered loding) appears incorrectly, whereas the one of the rocks (without dithered loding) shows properly.