Publish button inside custom field group

Question

Is it possible to move the publish button out of the publish metabox, completely remove the metabox and then put the publish button inside the custom field group? Ask if you need more information, I am not really sure what to say other than what I have.

Here is what I am aiming for in pictures.

From this:

To this:

Or if that is to demanding then just this:

Answer 1

Try this:

<div class="my-metabox">
    <!-- This is your metabox HTML -->

    <-- Add this button somewhere: -->
    <button id="my-submit" class="button button-primary button-large">Submit</button>
</div>

Add this JavaScript snippet however you want only to this screen (either by checking the post type and enqueue this in the admin footer or output it directly along with your metabox HTML):

<script type="text/javascript">
    jQuery(function($) {
        // You can substitute this with a CSS rule somewhere:
        // <style type="text/css"> #submitdiv { display: none } </style>
        // if you wish to avoid the hiding 'flicker'
        $('#submitdiv').hide();

        $('#my-submit').on('click', function(ev) {
            ev.preventDefault();                
            $('#publish').trigger('click');
        });
    });
</script>