Feature Request: add Function Keys (F1-F12) in SSH virtual keys

[dsvf]

Hello, thank you for this amazing app.

Previously, I have used JuiceSSH, which had the option to show the function keys F1-F12 in the virtual keys above the keyboard.
This is useful in some programs, like htop, which uses the Fn keys for functionality.

Is there a way to add this to the app?