For now, hide the lock screen setting

Task #1858
Mek panic screen transparent

Feature #2270
Merge branch 'master' into task_1868_lock_screen_setting
Adjust transparency
Merge branch 'task_1868_lock_screen_setting' of https://github.com/mikaelvonpfaler/iWitness into mikaelvonpfaler-task_1868_lock_screen_setting