Cipher -> To Consensus: Offer wallet's Oasis account's addresses as a drop down

[tjanez]

Currently, when transferring one's tokens inside CIpher back to the consensus, one is presented with his currently opened Oasis account address as the destination address in light gray:

I think this is confusing and the UI should more prominently show which Oasis account addresses belong to the currently opened wallet/account.

I think we should also aim to unify this with the Emerald -> To Consensus functionality and offer both:

1. Currently opened wallet's Oasis account's addresses as a drop down or something (see also Emerald -> To Consensus: Offer wallet's Oasis account's addresses as a drop down #190).
2. Any "external" Oasis address.