Make the sensor as big as its parent

There is no need to make the sensor bigger, it won't have to fire any
event, it's 'expand' and 'shrink' which have such a need. Having the
sensor bigger than its parent would cause the parent(s) to scroll.

Author: Alberto Villa

src/ResizeSensor.js

@@ -67,7 +67,7 @@
             var style = 'position: absolute; left: 0; top: 0; right: -30px; bottom: -30px; overflow: hidden; z-index: -1; visibility: hidden;';
             var styleChild = 'position: absolute; left: 0; top: 0; transition: 0s;';
 
-            element.resizeSensor.style.cssText = style;
+            element.resizeSensor.style.cssText = style + ' right: 0; bottom: 0;';
             element.resizeSensor.innerHTML =
                 '<div class="resize-sensor-expand" style="' + style + '">' +
                     '<div style="' + styleChild + '"></div>' +