Some more feedback after further playing with your creation.

I suppose it would make sense to have a toggling button for SOS?
You never know if N900 and Lanterne could save somebodies life.
I have added Lanterne to Lens Launcher so I can select it quickly.

Presonally I am finding the default button height too small.

Is it correct the values do not save? I suppose now the settings are on mostly on one page out the way, a "QSettings:save" button and a "reset to default" button should be fairly easy to add to the bottom of the window?

Edit:-
Also bugtracker is missing from the control file