Manually trigger showing address on Ledger

[kwunyeung]

I have received another comment from Ledger. They said this should be the last comment before the app will be listed on public.

They would like us to have a way to manually trigger the Ledger to show the address so that the user can verify the added address is the same as the one on Ledger. It can be in the context menu. This is what they showed me from Polkadot as an example.

I can't find it on polkadot.js.org though.

Maybe we can add the button in the context menu of each account.