GUI -- TopoView - working on mouse gestures - drag, click on nodes; mouseover,mouseout (WIP).

Change-Id: I2ecd4f805267fe72685381eb297a3d4cbbbd360a
diff --git a/web/gui/src/main/webapp/app/fw/svg/svgUtil.js b/web/gui/src/main/webapp/app/fw/svg/svgUtil.js
index e99da3c..ab56ddd 100644
--- a/web/gui/src/main/webapp/app/fw/svg/svgUtil.js
+++ b/web/gui/src/main/webapp/app/fw/svg/svgUtil.js
@@ -112,16 +112,14 @@
                                 // consider this the same as a 'click'
                                 // (selection of a node)
                                 if (clickEnabled()) {
-                                    selectCb(d, this);
-                                    // TODO: set 'this' context instead of param
+                                    selectCb.call(this, d);
                                 }
                             }
                             d.fixed &= ~6;
 
                             // hook at the end of a drag gesture
                             if (dragEnabled()) {
-                                atDragEnd(d, this);
-                                // TODO: set 'this' context instead of param
+                                atDragEnd.call(this, d);
                             }
                         }
                     });