Warning text when you click Deposit/Withdraw for the first time

There should be a clear highlight (or copy paste from the gateway help page) for first-time users.

it's still not clear enough for some how gateways work and are related (or the lack of) with bitshares core

In bitshares-ui, start by tracing the Deposit/Withdraw first-use flow and compare its current warning with the gateway help page. Done means first-time users see a clear highlight or equivalent copy explaining how gateways relate to BitShares core, with the wording verified in the relevant UI path.

Written by the indexing model from the issue text.