Couple UI things: Dialogs could be higher or you could put them to two columns and use buttons.
Bold?
"Tab Bar visible" doesn't fit to the button. Horizontal radio-buttons would look nicer
These arrows could be on right side of screen, so you could put your left thumb on the proximity sensor and use your right thumb to click them
Why is a proximityd installed with the editor ? Runs it all the time in background ?