Hey There.
Been on Vacation and getting caught up, but if you have not gotten this yet.
You can create a button and then have it be the submit and equate to the button in the toolbar. Or you can have rules which submit to your dataconnection and perform other actions too.
You may want to check out the Database Accelerator which allows you to submit data with much greater granularity in the security along with many other advantages.Qdabra Database Accelerator Suite Version 2.1 - Developer