Adds a second QuickFix to the speaker_presets_count warning, reusing
the existing postSourcesUpdated fix (checks_refresh_sources.go). It
nudges the speaker to re-fetch /full, which is confirmed (both from
marge.AccountFullToXML and a genuine captured Bose-cloud response) to
carry presets alongside sources.
Whether firmware actually re-applies /full's preset section back onto
its own local table is unconfirmed — issue253_regression_test.go
already flags that exact link as untested. So this is offered as a
free, non-destructive thing to try first, with the guaranteed
restore_presets_to_speaker push as the fallback. Gives both directions
(pull-style nudge, direct push) rather than only the one.
Refs #614