Export and Import any UR from clipboard

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.