ios: impove kit handling

* setting sticky to the proprieties that are not supposed to be modified
* mutable device helps when using multiple devices

Change-Id: I739962529c4e92090e57ef6f332c1bed8cf0a2db
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Make "Reset warnings" option reset "Do not ask again" messages.

And unify them.

Task-number: QTCREATORBUG-10523
Change-Id: I1e1262ff25f51e6068e16adaeb25d553f9bffb1f
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>