T3364
The legacy access point for the etokens screen has always been a bit unintuitive so this diff decouples it from the Home component and establishes it as a standalone component accessed from the bottom navigation menu. This will also make it easier to update eToken related UI in the future without getting tied up amongst TxHistory code.
The removal of the original Etokens tab on the Home component meant there is no reason for the active tab switching menu (since it's just Tx History now by itself), hence removing the tab altogether in Home.js.
This is updated for the extension as well.
Note: We should announce this adjustment via twitter once landed as it may not be obvious to users.
Separate future diffs will enhance the Send component to incorporate the sending of etokens on the same page.