Missing option to disable locking while charging?

[kpieckiel]

My Droid DNA used to have an option that I could toggle so that when my phone was on a charger it wouldn't blank the screen and lock (but when it wasn't on a charger it would still blank and lock after the timeout I set like normal). I reset my phone to factory defaults last night and now I can't find that option anymore. Where is that option? Was this option removed with an update, and if so how did that setting carry over to the latest update? I didn't install any lock screen or home screen apps to give me that functionality; it was native to the phone when I bought it.

Android version 4.4.2
HTC Sense version 5.5
No mods, roots, etc.

Thanks,
Kevin