> qt: add RPCConsole::TimeDurationField helper, call systime only once
> gui: add "Last Tx" (CNodeStats::nLastTXTime) to peer details
> gui: add "Last Block" (CNodeStats::nLastBlockTime) to peer details
This is a backport of [[https://github.com/bitcoin-core/gui/pull/226 | core-gui#226]]
Depends on D10963