Fixes issue with incorrect menu showing when returning from folder list.

Repro steps:
from inbox, tap "show all labels"
press up or back
still shows folder management action bar

Change-Id: Ie4787448b4f3d4010c5eda59bbdc248ab22c39ad
diff --git a/src/com/android/mail/ui/OnePaneController.java b/src/com/android/mail/ui/OnePaneController.java
index f2bcd3a..9074050 100644
--- a/src/com/android/mail/ui/OnePaneController.java
+++ b/src/com/android/mail/ui/OnePaneController.java
@@ -205,6 +205,7 @@
     }
 
     private void transitionToInbox() {
+        mViewMode.enterConversationListMode();
         ConversationListContext listContext = ConversationListContext.forFolder(mContext,
                 mAccount, mInbox);
         // Set the correct context for what the conversation view will be now.
@@ -244,9 +245,9 @@
     }
 
     private void transitionBackToConversationListMode() {
+        mViewMode.enterConversationListMode();
         mActivity.getFragmentManager().popBackStack(mLastConversationTransactionId,
                 FragmentManager.POP_BACK_STACK_INCLUSIVE);
-        mViewMode.enterConversationListMode();
         resetActionBarIcon();
     }
 }