[[ Bug 10634 ]] Script editor "go to definition" does not find handlers in behaviors or library stacks.
[[ Bug 10634 ]] Make sure we also consider backgrounds when enumertaing handlers gor "go to definition".
Merge branch 'bugfix-10634' of https://github.com/runrevmichael/livecode into bugfix-10634
Merge branch 'bugfix-10634' into release-6.1.2