GUI -- Implemented Instance Panel.
- handling addInstance event.

Change-Id: Ic98a3291bd37ecf1155dbe1696167d0635a31972
diff --git a/web/gui/src/main/webapp/app/fw/svg/glyph.js b/web/gui/src/main/webapp/app/fw/svg/glyph.js
index ca046b5..af0ae38 100644
--- a/web/gui/src/main/webapp/app/fw/svg/glyph.js
+++ b/web/gui/src/main/webapp/app/fw/svg/glyph.js
@@ -218,8 +218,7 @@
         if (xns) {
             atr.transform = sus.translate(trans);
         }
-        elem.append('use').attr(atr).classed('overlay', ovr);
-
+        return elem.append('use').attr(atr).classed('overlay', ovr);
     }
 
     // ----------------------------------------------------------------------