[refactorTouchDispatcher] added test for multiple callbacks at the same dispatcher
[refactorTouchDispatcher] added test for multiple callbacks at the same dispatcher

jacqt/plottable,iobeam/plottable,danmane/plottable,palantir/plottable,danmane/plottable,palantir/plottable,softwords/plottable,jacqt/plottable,jacqt/plottable,softwords/plottable,palantir/plottable,NextTuesday/plottable,NextTuesday/plottable,NextTuesday/plottable,softwords/plottable,iobeam/plottable,iobeam/plottable,danmane/plottable,palantir/plottable