Add option to auto generate QR from clipboard

[J-PRS]

When pressing the + button it could generate the QR right away instead of having to long press the input field, tap copy and press the confirm button.

[markusfisch]

Good idea! Thanks for the suggestion! 👍

By the way: I just noticed that since Android 13 there is a clipboard popup with a share option when you copy a text. So on Android 13+, this probably isn't really necessary.