Revert an incorrect change made in
c5fc945f33 (imported from viewer 3).
This stops ASSERT(mSegments.back()->getEnd() == getLength())
in LLTextEditor::loadKeywords.
Up to date definitions and reorganizations,
commented out constants that apparently don't exist.
Fixed Strings not highlighting by borrowing missing code from Phoenix.
Also, this fixes 1020 being treated as UnknownAltitude when not on SL grid
and cleans up the horrible tabbing/spacing mud in llfloateravatarlist.cpp
