Hardware "back" button doesn't work on passcode screen

[ghewgill]

My phone (Samsung S4) has a hardware Back button. If I accidentally launch SN and didn't want to, the Back button does not do anything on the passcode prompt screen. The Back button should quit the app here.

[moughxyz]

Hmm..the back button here was explicitly disabled, since first the app launches, then presents the passcode window. Back would dismiss the passcode window. I'll have to see if there's a way to programmatically dismiss an app. I'm sure it's possible to quit an app, but that would kill it completely, including from multitasking.