Copicu v0.4.0-rc.6

Filter usability update: an inline X clears the current picker filter immediately and also releases any persistent filter lock so the query cannot reappear on reopen.

Installer SHA256: 192C86972BDF1B6806914DD06C42AA2F89B5A48B1B163A34A1A39497740805F7
Target commit: ca6dfc02abc1dc540fc43dc56b72049a206b6204