Replaces batchduplicate implementation w/ CC flag

The CC now implements batch duplicate functionality, hidden behind the
enableBulkDuplication flag. This commit removes our basic implementation
of that feature and instead force-enables that CC flag when the batch
duplication option is enabled.

Change-Id: Ic2ac504026073087a767c2d264307acb278878da
diff --git a/src/console_inject_start.js b/src/console_inject_start.js
index fef90f7..047f2b7 100644
--- a/src/console_inject_start.js
+++ b/src/console_inject_start.js
@@ -1,11 +1,15 @@
 chrome.storage.sync.get(null, function(items) {
-  if (items.loaddrafts || items.escalatethreads || items.movethreads) {
+  if (items.loaddrafts || items.batchduplicate) {
     var startup = JSON.parse(document.querySelector("html").getAttribute("data-startup"));
 
     if (items.loaddrafts) {
       startup[4][13] = true;
     }
 
+    if (items.batchduplicate) {
+      startup[4][58] = true;
+    }
+
     document.querySelector("html").setAttribute("data-startup", JSON.stringify(startup));
   }
 });