adds checkin deletion strings to translations

mobile/com.sap.sailing.android.tracking.app/res/values-de/strings_dialog.xml

@@ -5,5 +5,6 @@
     <string name="confirm_data_you_are_signed_in_as_sail_id">Sie sind als {sail_id} gemeldet</string>
     <string name="confirm_data_is_correct">OK</string>
     <string name="decline_data_is_incorrect">Das bin nicht ich!</string>
+    <string name="confirm_delete_checkin">Möchten Sie den Checkin wirklich löschen?</string>
 
 </resources>

mobile/com.sap.sailing.android.tracking.app/res/values/strings_dialog.xml

@@ -6,5 +6,5 @@
     <string name="confirm_data_you_are_signed_in_as_sail_id">You are signing in as {sail_id}</string>
     <string name="confirm_data_is_correct">OK</string>
     <string name="decline_data_is_incorrect">That\'s not me!</string>
-
+    <string name="confirm_delete_checkin">Do you really want to delete this checkin?</string>
 </resources>

mobile/com.sap.sailing.android.tracking.app/src/com/sap/sailing/android/tracking/app/ui/fragments/HomeFragment.java

@@ -239,7 +239,7 @@ public class HomeFragment extends AbstractHomeFragment implements LoaderCallback
         final String checkinDigest = cursor.getString(cursor.getColumnIndex("event_checkin_digest"));
         DatabaseHelper.getInstance().getEventInfo(getActivity(), checkinDigest);
         AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(), R.style.Base_Theme_AppCompat_Dialog_Alert);
-        builder.setMessage("Test");
+        builder.setMessage(getString(R.string.confirm_delete_checkin));
         builder.setCancelable(true);
         builder.setNegativeButton(getString(R.string.no), null);
         builder.setPositiveButton(getString(R.string.yes), new DialogInterface.OnClickListener() {