T3216
Depends on D14334
Upon successful broadcast of an alias registration tx, the new alias will be added to localForage and tracked via the Pending Aliases dropdown.
When a new block is detected in `processChronikWsMsg`, the pending aliases in localForage are cleared.
If the user's cashtab was not opened at the time of a new block, visiting the Alias.js page will trigger validation to remove any recently registered aliases in the pending aliases list.