Disable pull to refresh for GB devices.

Doesn't work well on GB. Google wrote it so that's no surprise.

// FREEBIE

src/org/thoughtcrime/securesms/ContactSelectionListFragment.java

@@ -18,6 +18,7 @@ package org.thoughtcrime.securesms;
 
 
 import android.database.Cursor;
+import android.os.Build;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.LoaderManager;
@@ -90,6 +91,8 @@ public class ContactSelectionListFragment extends    Fragment
     listView.setDrawingListUnderStickyHeader(false);
     listView.setOnItemClickListener(new ListClickListener());
 
+    swipeRefresh.setEnabled(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT);
+
     return view;
   }