Proposed ui changes and code consolidation for the cashtab header.
- consolidate header code into one component
- new ui cards for xec, xecx, and firma balances with individual fiat balances
- xecx and firma info in place of 0 balances
- cleaned up wallet select, copy address and hide balances
- update tests to work with new header
before
{F14212198}
after
{F14212197}