docs(views): Updated docs for elgg_extend_view() to address uniqueness of extended views.

Fixes #6661
Merge pull request #6663 from brettp/views_docs

docs(views): Updated docs for elgg_extend_view() to address uniqueness of extended views.
feature(core): allow custom local scripts to trigger on uncaught exceptions #6586
Merge pull request #6606 from beck24/custom-exceptions

feature(core): allow custom local scripts to trigger on uncaught exceptions
fix(embed): embed jquery target is now searched for instead of assuming last class
Merge pull request #6796 from beck24/embed_js

fix(embed): embed jquery target is now searched for instead of assuming last class