Scanning QR via camera and loading QR from file

Added scanning created (or any) QR via camera, to auto load them to be able to decrypt fast. Loading QR images also implemented.

Major improvements:

• Show/Hide passphrase
• Repeat passphrase no longer needed to decrypt
• While this tool was meant to use offline from a PC, added improvements for mobile UI
• Switching language won't clear anything

Full Changelog: v1.3.1...v1.4.0

Just donation addresses update

Rework donation show/hide QR logic