OTRACK acquired tracking points by dwell during a command or grip drag,
but only cleared them when OTRACK was toggled off — so the temporary
tracking-point symbols (drawn straight from the point set) lingered in
the view after the command ended.
Drop the tracking points once neither a command nor a grip drag is
active. Acquisition only happens during those, so this covers every
exit path (Esc, cancel, commit) from one place. The tracking vector is
a preview wire already cleared on cancel.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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