Bounty address: cosmos1zra3wz596n0qc898myceka3q23x9rk8fuw65c7

Fixed a bunch of conflicts with recent renaming

That helps when some commands are not running properly.

Also simplify the logic by removing the read of the --from flag, which
is no longer used in this command.

BroadcastTx now takes a cosmosaccount.Account instead of just an account
name. Since ensure the account comes from the keyring, and avoid the
BroadcastTx impl to re-check that (because the keyring is always
checked before the call to BroadcastTx).

fees are required, at least in cosmos-hub to send funds to an other
account. W/o fees the transaction returns this message:
error code: '13' msg: 'insufficient fees; got:  required: 8uatom:
insufficient fee'

Also increase the additional gas amount added to the simulated gas,
because I got some insufficient gas error with the previous value.

Previous mode BroadcastBlock alweus triggered a timeout error, even if
the tx was finally accepted in a block.

RPC error -32603 - Internal error: timed out waiting for tx to be
included in a block

The default value is still block but the flag can change to sync in
order to avoid timeout when the tx is broadcasted to busy nodes.

Also add a `node query tx` so the user can check when his tx is
included in a block.