Allow to configure scaling of the app

I would like to be able to configure precisely the scaling of the app. The font size can be too small or too large depending on the phone, and the user preference. I think it's important that the user can choose what scaling works best for him.

🎯 Target app: Signal UT

👨‍💻 Created by: pparent

🏷️ Status: 🆕 New

💰 Total pledged by everyone: 10.00 €