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/main.js b/src/contentScripts/communityConsole/main.js
index 5db25fc..5518df8 100644
--- a/src/contentScripts/communityConsole/main.js
+++ b/src/contentScripts/communityConsole/main.js
@@ -118,7 +118,7 @@
     // Set up the autorefresh list feature
     if (options.autorefreshlist && ('tagName' in node) &&
         node.tagName == 'EC-THREAD-LIST') {
-      autoRefresh.setUp();
+      window.TWPTAutoRefresh.setUp();
     }
 
     // Redirect unified profile iframe to dark version if applicable
@@ -133,7 +133,7 @@
   // Remove snackbar when exiting thread list view
   if (options.autorefreshlist && 'tagName' in node &&
       node.tagName == 'EC-THREAD-LIST') {
-    autoRefresh.hideUpdatePrompt();
+    window.TWPTAutoRefresh.hideUpdatePrompt();
   }
 }