Help screen clarification

"dangerous" -> "critical" with an explanation.
critical changed back to dangerous
Updated Arabic translation (menu_restriction_all)
Merge pull request #784 from waleedhassan/patch-6

Updated Arabic translation (menu_restriction_all)
Updated changelog
Merge pull request #780 from jpeg729/menu_items

Help screen clarification
Fix version codes

Refs #785
Merge branch 'master' of https://github.com/M66B/XPrivacy