Refine the UX around key input/confirming

[urcades]

Galen Feedback:

• The arrow next to ‘Confirm master key’ is really confusing. Is that a link? What is that?
• If I click ‘change wallet’ there doesn’t appear to be any way to exit out of the ‘import your public key’ flow. Clicking the background doesn’t close the modal.
• Even worse, it reappears on refresh. I guess I cleared my wallet? This should have a prompt in front of it or something if I’m resetting the app state

[urcades]

see #22 , I think this has been solved