and restore ability to have different internal ConfigVar name and user-visible "key"
(Keys are hard to change as that breaks compat, but it is nice to be able to change
the internal var name, to reorganise stuff sometimes. After new ConfigVars are added,
sometimes we get better insight into how the older ones should have been named.)
follow-up https://github.com/spesmilo/electrum/pull/9648
running a watchtower requires to be able to run a daemon with the
watchtower plugin enabled. If users succeed at doing that, we
can expect them to be able to configure theclient using the
command line.
(that would not work with QML, though. maybe QML could use an
advanced config editor)
