Add a helper helper so we can get click events on message list menu items

package com.fsck.k9.helper;

import android.content.Context;

import android.view.View;

import android.widget.AdapterView;

import com.actionbarsherlock.internal.view.menu.MenuBuilder;

import com.actionbarsherlock.internal.view.menu.MenuPopupHelper;

public class MenuPopup extends MenuPopupHelper {

    OnMenuItemClickListener onMenuItemClickListener;

    public MenuPopup(Context context, MenuBuilder menu, View anchorView) {

        super(context, menu, anchorView);

    }

    public void setOnMenuItemClickListener(

            OnMenuItemClickListener onMenuItemClickListener) {

        this.onMenuItemClickListener = onMenuItemClickListener;

    }

    @Override

    public void onItemClick(AdapterView<?> parent, View view, int position,

            long id) {

        super.onItemClick(parent, view, position, id);

        if (onMenuItemClickListener != null)

            onMenuItemClickListener.onMenuItemClick(position);

    }

    public interface OnMenuItemClickListener{

        public void onMenuItemClick(int itemID);

    }

}