Change window.autoRefresh to window.TWPTAutoRefresh

This will make it much less likely to conflict with another vanilla
Community Console global variable called like that.

Change-Id: I4da7aafd1bd4694262fa09adb14709a8510743b3
diff --git a/src/contentScripts/communityConsole/start.js b/src/contentScripts/communityConsole/start.js
index 93ee6ab..d4c4bd6 100644
--- a/src/contentScripts/communityConsole/start.js
+++ b/src/contentScripts/communityConsole/start.js
@@ -26,7 +26,7 @@
   // Initialized here instead of in main.js so the first |ViewForumResponse|
   // event is received if it happens when the page loads.
   if (items.autorefreshlist)
-    window.autoRefresh = new AutoRefresh();
+    window.TWPTAutoRefresh = new AutoRefresh();
 
   if (items.ccdarktheme) {
     switch (items.ccdarktheme_mode) {