online bug: slect no-first filter at filterdocker -> undoredo or [miniusize mainwindow, show mainwindow] or switch back to filterdock -> reselect the firset filter
online bug: switch back to filterdock -> fliterdocker flicker
online bug: click the top or bottom of filteritem and then auto select first item
test: close filterdock and open again -> ok
online bug: slect no-first filter at filterdocker -> undoredo or [miniusize mainwindow, show mainwindow] or switch back to filterdock -> reselect the firset filter online bug: switch back to filterdock -> fliterdocker flicker online bug: click the top or bottom of filteritem and then auto select first item test: close filterdock and open again -> ok