Replicate Metamask's "Connect Hardware Wallet" flow

[brusherru]

Instead of current importing public keys one by one we should do the same flow as in Metamask:

1. It should display up to 5 public keys per page
2. Every public key goes with the SingleSig address and it's balance (in the current network)
3. Every public key has it's own checkbox (selectable)
4. If at least one checkbox is selected — "Import" button become active
5. There should be pagination (which does not reset selection), to allow selecting more than 5 keys at once
6. There should be a line with amount of selected keys, e.g. "You have selected 9 public keys to import".
7. There should be a checkbox "Create SingleSig account for imported keys"

For the reference: