GUI -- Renamed 'preload' callback function to be 'init'; a better name, I feel.

Change-Id: I96d0892c0d78b1ac50044f57669bd84146808018
diff --git a/web/gui/src/main/webapp/topo.js b/web/gui/src/main/webapp/topo.js
index 704ade1..ce1fceb 100644
--- a/web/gui/src/main/webapp/topo.js
+++ b/web/gui/src/main/webapp/topo.js
@@ -2862,7 +2862,7 @@
     // ==============================
     // View life-cycle callbacks
 
-    function preload(view, ctx, flags) {
+    function init(view, ctx, flags) {
         var w = view.width(),
             h = view.height(),
             fcfg = config.force;
@@ -3161,7 +3161,7 @@
     // View registration
 
     onos.ui.addView('topo', {
-        preload: preload,
+        init: init,
         load: load,
         unload: unload,
         resize: resize,