- don't push current pane to backstack if it was called via back button

- fixes endless loop of while toggling panes

mobile/src/com/cradle/iitc_mobile/IITC_Mobile.java

@@ -370,6 +370,7 @@ public class IITC_Mobile extends Activity implements OnSharedPreferenceChangeLis
         // Pop last item from backstack and pretend the relevant menu item was clicked
         if (!mBackStack.isEmpty()) {
             backStackPop();
+            mBackButtonPressed = true;
             return;
         }
 
@@ -405,8 +406,10 @@ public class IITC_Mobile extends Activity implements OnSharedPreferenceChangeLis
 
         // map pane is top-lvl. clear stack.
         if (pane == Pane.MAP) mBackStack.clear();
-        else mBackStack.push(mCurrentPane);
+        // don't push current pane to backstack if this method was called via back button
+        else if (!mBackButtonPressed) mBackStack.push(mCurrentPane);
 
+        mBackButtonPressed = false;
         mCurrentPane = pane;
         mNavigationHelper.switchTo(pane);
     }