Picking "Other header…" in the filter dialog took the comparator away.
The condition row has three columns — field, comparator, value — and the
box for the header name was rendered into the comparator's, so the
comparator disappeared along with any way to change it. Whatever it had
been when you switched, contains, was what the rule got: matching a
header exactly, or on a regex, could not be expressed at all.
The header name now has a column of its own and the comparator keeps
its, on a row that widens to hold both.
Fixes#23
Renaming or editing a Sieve rule moved it to the bottom of the list, and
in Sieve the order is the order the rules run in, so mail started being
filed by a different rule than before. Putting it back took a click per
place moved.
Two things did it. saveAndApply always appended the rule it was given —
right for a rule created from a message, wrong for one being edited. And
the "Also apply to existing messages" tick defaulted to on wherever it
was offered, so every edit in Settings went down that path, including a
plain rename.
The rule now keeps its seat: a shared upsertRule replaces by id in place
and only appends what is genuinely new. The tick defaults to on only in
"Filter messages like this…", where applying it is the point, and the
toast no longer calls an edited rule "created".
Fixes#24