[[ Bug 12286 ]] Make sure we use the frame rect to work out zoom location, rather than the content rect.
[[ Bug 6400 ]] Make sure singular tab buttons are marked as first and last.
[[ Bug 8041 ]] Make it so that group scrollbars are only active in Browse mode.
Merge branch 'bugfix-8041' of https://github.com/runrevmark/livecode into bugfix-8041
Merge branch 'bugfix-8041' into release-6.6.2
Merge branch 'bugfix-6400' into release-6.6.2
Merge branch 'bugfix-12286' into release-6.6.2