Bug: Back button from Settings doesn't work

[e-t-l]

Went into settings to adjust image quality (note: is there somewhere simpler to put that option? Seems unnecessary to tap three different things just to access one single setting), and the back button in the upper left corner doesn't work. I had to use my device's back-button in order to exit the settings menu.

[Polyziog]

#41 Fixed back button and added dark mode