As a p.o.c., load the built-in wordlist into storage once, and
thereafter use it from there rather than as a file. Now it can go away
and a wordlist for the user's locale be downloaded and stored instead.
Motiviation was to be able to deliver a message in the background, but
at least for now it's easier not to close games again. Can always do
that later if it's a memory problem.
I'm wrestling with how to have concurrent tabs open. They can't be on
the same game because both can't connect using same MQTT dev id (and
they'd quickly get the saved state screwed up.) Only problem is
sometimes a tab in a new window doesn't have access to localstorage and
so is able to connect on its own. But later that state isn't reachable
any more: relaunch firefox and you get back the to the older state.
