Export and Import any UR from clipboard

[ChristopherA]

We should be able to export and import any UR from the clipboard (and maybe files), and probably at least temporarily the Account Map JSON until we have a UR for it.

To import, I see new button in Recovery: Recover from Clipboard and Recovery from File. Both will error out if no UR on clipboard (or temporarily also Account Map). If a crypto-seed or shard, it will then continue with the correct flow.

To export, any place that a QR probably two icons, UR text to clipboard and UR text to file. Or @wolfmcnally had a good UI for this in his wallet app so we don't have to have 4 buttons on every QR screen.