GUI -- topo  - fix incorrect function reference.

Change-Id: I937808577ceed5c43afe840fb543af3a6c2401fd
diff --git a/web/gui/src/main/webapp/app/view/topo/topo.js b/web/gui/src/main/webapp/app/view/topo/topo.js
index 1b6859c..75155e8 100644
--- a/web/gui/src/main/webapp/app/view/topo/topo.js
+++ b/web/gui/src/main/webapp/app/view/topo/topo.js
@@ -200,7 +200,7 @@
 
         } else if (tps.summaryVisible()) {
             // else if the Summary Panel is visible, hide it
-            tps.hideSummaryPanel();
+            tps.hideSummary();
         }
     }