fix(gestures): drag events are debounced

- Performance regressions in menu, sliding item, toggle, go back swipe and scroll up to refresh.
- Buggy sliding item

src/gestures/drag-gesture.ts

@@ -110,7 +110,9 @@ export class PanGesture {
   pointerMove(ev: any) {
     assert(this.started === true, 'started must be true');
     if (this.captured) {
-      this.onDragMove(ev);
+      this.debouncer.write(() => {
+        this.onDragMove(ev);
+      });
       return;
     }