The table was clearable behind a confirm. It should not be: a stand
earns its place and loses it only to a better summer, so the control
and clearScores() are gone and the screen says so.
Retiring writes each player's closing balance to a top-ten table in
localStorage, reachable from the title screen and the standings, with
the summer just finished picked out in yellow.
Stored rows are user-editable, so every field is validated on load and
malformed entries are dropped. Storage being unavailable is a normal
case, not an error: the game plays on with an empty table.
Also stops the status line claiming DAY 00 on screens that have no day.
jcoffey-dev