SimSettings: Improve dialogs

Squash of:

Settings: no need to show a success alert dialog on sim switch

very 'un-android-like' :)

Change-Id: Ie68eed174464d7acf67171a509a19045e0d9c669

Settings: fix neverending progress on sim activation change

what a stupid bug....

and while we are here - also the confirm dialog on
deactivation is actually useless - using the switch
should be more enough to not always ask and anoy user
if he really knows what he is doing

Change-Id: I38eb17cf8d12259f34b339da2ad807d12a5c0d41