Updated default component view.

Added target property to anchor.
Update Menus controller

1) Post data is filtered in ```update_onSave``` and ```create_onSave``` ajax hanldlers. So, ```external_url``` and ```internal_url``` replaced by ```url``` property in dependent of ```is_external``` property
2) Edit action: As external_url and internal_url doesn't exist in database, we need fill this field with url value.
added ability to link external sites
Update Menus controller

Issue with Save&Close is fixed
Added ability to link to external sites
Added ability to link to external sites
Merge branch 'adisos-master'