Revert "Revert "[MT] Fix some trees drawn even after the feature was destroyed""

This reverts commit c6cb9b0d3a47347b8f48b5cc8b0e18130187a8f4.
clamp GroundDetail 0..200
might prevent some out of memory with insane high values
fix an ati crash in SMF shader
try to fix #3551
changelog
workaround #3551: disable far grass rendering on ATi's when shadows are enabled
Merge branch 'release' of github.com:spring/spring into release
QTPFS: fix map edge tesselation
Revert "[MT] Fix some trees drawn even after the feature was destroyed"

This reverts commit 4cb30edf19d4c89bdaef5cdb038132453f4ab9b1.
Merge branch 'release' into develop