Add test for dismissing when movable()
Add test for dismissing when movable()

Also assert that the "movable" class is not applied by default.

palantir/plottable,alyssaq/plottable,RobertoMalatesta/plottable,gdseller/plottable,NextTuesday/plottable,onaio/plottable,softwords/plottable,jacqt/plottable,danmane/plottable,jacqt/plottable,gdseller/plottable,softwords/plottable,alyssaq/plottable,alyssaq/plottable,onaio/plottable,danmane/plottable,iobeam/plottable,onaio/plottable,softwords/plottable,gdseller/plottable,palantir/plottable,iobeam/plottable,NextTuesday/plottable,RobertoMalatesta/plottable,iobeam/plottable,palantir/plottable,palantir/plottable,RobertoMalatesta/plottable,danmane/plottable,NextTuesday/plottable,jacqt/plottable