Fixed widget height calculation

Change-Id: I418b0bf0ed29a123e030853f47ca8964e0960bff
diff --git a/dev/js/src/plugin/client.js b/dev/js/src/plugin/client.js
index 4e7e337..4e6ec3c 100644
--- a/dev/js/src/plugin/client.js
+++ b/dev/js/src/plugin/client.js
@@ -69,9 +69,16 @@
      * embedding KorAP
      */
     resize : function () {
+      var de = document.documentElement;
+      var height = de.scrollHeight;
+
+      // Add assumed scrollbar height
+      if (de.scrollWidth > de.clientWidth) {
+        height += 14;
+      };
       this._sendMsg({
         'action' : 'resize',
-        'height' : document.documentElement.scrollHeight
+        'height' : height
       });
     }
   };