Linden trees and grass fixes. 🔼

You can't wear them, as per commit 7771cc00c41147593af8ce692f386889e4a813de.

You can't put anything into their contents, though that might be a viewer issue.  So you can't script them.

They also can't have their params changed from a script in a prim they are linked to, this is NOT a viewer issue.

reported=2019-10-29 00:18:51

reporter=onefang

priority=none

category=Bug

severity=trivial