App restyling - Onboarding / Create account

[dtonon]

The workflow should be identical both for the onboarding and the addition of new accounts.

[dtonon]

Review of version 3.0.0-beta7

• The text "This is your public key" from the first view is missing;
• First view: I would disable the Continue button until all the fields are filled;
• Second view: I would disable the Continue button until the password field is filled;
• Second view: I would show the notice above the button, in red (like in the import key step), since this way is more visible;