Addition to maintenance
Fixes aalborg layouts, Issue #5742
Merge pull request #5859 from PerJensen/aalborg_layouts

Fixes aalborg layouts, Issue #5742
Merge pull request #5806 from PerJensen/aalborg_maintenance

Addition to maintenance PR #5783
moved head registration from view to plugin hook
moved iOS hack into core
added a little documentation
moves notifications menu item into account dropdown
made elgg_unregister_menu_item() more useful and used it in aalborg theme
adds ability to enable the query cache after being disabled
Fixes #5847 speeds up user location upgrade
Merge pull request #5860 from cash/aalborg_updates

Aalborg updates