Fixes #5522. Only adding children elements to menu items if they haven't already been added.
Refs #5522. Removed unused code.
Fixes #5337 properly checking if admin notice exists
Fixes #5430 adds work around for IE8 for jumping avatars
Fixes #5531 removes symbol interpretation from translit class
Merge branch '1.8'

Conflicts:
	engine/classes/Elgg/Translit.php
	views/default/css/ie.php