Android specific Konva HTML5 rect drag lag

@leydar wrote:

When dragging a rect created with Konva the shape lags badly after the touch position. This only occurs on Android; the web and iOS versions are really good. To replicate in its simplest form:

1. ionic start myApp blank
2. Add a reference to konva in index.html before app.js.
   <script src="https://cdn.rawgit.com/konvajs/konva/1.0.3/konva.min.js"> </script>
3. Add canvas div to the index.html ion-content
   <div id="canvas"></div>
4. Instantiate the canvas, layer and rect in the ionicPlatform.ready function:

       var _stage = new Konva.Stage({
         container: 'canvas',
         width: 1000, height: 1000
       });
       var _layer = new Konva.Layer();
       var _rect = new Konva.Rect({
           x: 100, y: 100, width: 100, height: 100,
           fill: '#090',
           draggable: true
       });
       _layer.add(_rect);
       _stage.add(_layer);

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