am 5b9ed2b0: Fix CAB mode on tablet

# Via Vikram Aggarwal
* commit '5b9ed2b056e0757ccc26e51aba7d5ff12378baaa':
  Fix CAB mode on tablet
diff --git a/src/com/android/mail/ui/AbstractActivityController.java b/src/com/android/mail/ui/AbstractActivityController.java
index 4cc56f9..96027e0 100644
--- a/src/com/android/mail/ui/AbstractActivityController.java
+++ b/src/com/android/mail/ui/AbstractActivityController.java
@@ -2542,7 +2542,7 @@
     @Override
     public void onSetPopulated(ConversationSelectionSet set) {
         mCabActionMenu = new SelectedConversationsActionMenu(mActivity, set, mFolder);
-        if (mViewMode.isListMode()) {
+        if (mViewMode.isListMode() || (mIsTablet && mViewMode.isConversationMode())) {
             enableCabMode();
         }
     }