[analyzer] MisusedMovedObjectChecker: Fix false positive on state-resetting,...

[analyzer] MisusedMovedObjectChecker: Fix false positive on state-resetting, handling method calls on base-class sub-objects

An earlier solution from Artem r315301 solves the reset problem, however, the
reports should be handled the same way in case of method calls. We should not
just report the base class of the object where the method was defined but the
whole object.

Fixed false positive which came from not removing the subobjects in case of a
state-resetting function. (Just replaced the State->remove(...) call to
removeFromState(..) which was defined exactly for that purpose.)

Some minor typos fixed in this patch as well which did not worth a whole new
patch in my opinion, so included them here.

Differential Revision: https://reviews.llvm.org/D31538

llvm-svn: 316850