fixes the backend part
remove tabs
set current page to active within the sidebar
update language on sideframe
Merge pull request #8 from FinalAngel/fixes/2685

Fixes/2685
Merge branch 'develop' into fix-2685

Conflicts:
	cms/templates/admin/cms/page/tree/menu_item.html
Merge pull request #2723 from digi604/fix-2685

fixes #2685 (tree view has links to current page language)