button to print recovery phrase

[derhuerst]

Fixes #3588.

Will add the Parity logo.

[derhuerst]

[jacogr]

• FF has the URL at top right (slightly different from what shown), but otherwise ok, looks good
• Would have added the print button to the modal buttonbar for the sake of uniformity (actions on the bottom in modals everywhere - bear in mid this affects 2 modals), but functional otherwise

[derhuerst]

FF has the URL at top right (slightly different from what shown)

That sounds a lot like the printing option that you can turn off in every browsers printing dialog. We don't have control over that afaik.

Would have added the print button to the modal buttonbar for the sake of uniformity

you're right. will make a follow-up PR.