[SUBS] Add payment option form validation visual bugs

[elvijsTDL]

If the form is invalid , network selection field will still have a red outline even though it is input

Super token field does not have a red outline if it is not input

It would be nicer if the green outline stayed in the form after focusing on a different field , and re-validated after user input, not just when "Add" button is clicked

Screen.Recording.2023-09-07.at.12.10.10.mov