Fixes #5312: Lightbox will not reposition itself after display on small viewport devices
basic site notifications
adds access override to create site notifications during cron job
Refs #5538 - Added regression test
Fixes #5551 removes corrupt entities from database
fixed location of parameters in cli installer script
fixed: pagination in online members overview
fixed: only returning groups in get_user_membership (as documented)
Merge pull request #5555 from jeabakker/groups-get-user-membership

get_user_membership could return more than groups
ElggFile->delete() will return a correct state even for non saved
entities
Merge pull request #5553 from jeabakker/working-pagination-in-online-users

The pagination in online members doesn't work
Fixes #5559 not clearing last_forward_from in session if login fails
change order so plugin/[pluginname]/settings is used instead of
settings/edit after upgrade of a plugin
Merge pull request #5563 from jeabakker/better-result-for-elggfile-delete

ElggFile->delete() can return false on success or null on failure
Refs #5565 adds documentation on ACCESS_DEFAULT
Fixes #5567 throw exception when saving with ACCESS_DEFAULT
Fixes #5564 count works with elgg_get_entities_from_annotation_calculation()
not forcing the limit to be a certain value in content plugins
no need for error layout top margin
improved layout by separating title and content