Fixes #1708. Moving up subpages when delete a page wasn't be applied in page_top subtype.
fixed the switch from page to page_top - the parent_guid metadata needed to be deleted
Refs #1708. Restore disappeared subpages, which its parent page was top_page and was deleted.
fixed upgrade script - was skipping pages because we were changing the results between calls to ElggBatch
Fixes #3754: Language JS views send cache headers and support conditional get
Fixes #5297: Improve error message in cases of suspected cross-domain login
Fixes #4972: More robust friendly titles implementation
Allow pages revisions to be reverted or deleted
Removing redundant logged in user check from pages annotation delete action (also from the comments delete core action)
Changed blog draft noticed CSS classes
Register bookmarks view for ecml parsing
Merge pull request #5310 from mrclay/4972

Fixes #4972: More robust friendly titles implementation
Merge pull request #5308 from mrclay/3754-18

Fixes #3754: Language JS views send cache headers and support conditional get
clear entity cache for the subpages that were promoted to pages
Merge pull request #5305 from cash/delete_top_page

Moving sub pages to top pages when parent deleted
Merge pull request #5309 from mrclay/5230

Fixes #5297: Improve error message in cases of suspected cross-domain login
Refs #5297 encourage users to try again now that they have been forwarded to the correct domain
documentation updates
removed remnants of db profiling
cleanup of entity caching code