adds form active/inactive status switch to Gravity Forms form settings page

form_settings_status

// display form active/inactive status on the form settings view
add_filter('gform_form_settings', 'form_settings_status', 10, 2);
function form_settings_status($settings, $form){   
    $form_info = RGFormsModel::get_form($form["id"]);
    $status_val = intval($form_info->is_active);
    $status = $status_val ? __('Active', 'gravityforms') : __('Inactive', 'gravityforms');
    $settings["Form Basics"]["form_status"] = "<tr><th><label>Form status</label></th><td><img class='gform_active_icon' src='".GFCommon::get_base_url()."/images/active{$status_val}.png' style='cursor:pointer;margin:5px 0 0 0;float:left;' alt='{$status}' title='{$status}' onclick='ToggleActive( this, {$form["id"]} );' /> <span class='gform_status' style='margin:3px 0 0 10px;float:left;' >{$status}</span></td></tr>";
    return $settings;
}
// add script to settings page to allow toggling of active/inactive status
add_action('gform_admin_pre_render', 'pre_render_status');
function pre_render_status($form){
    if (RGForms::is_gravity_page() && rgget('page') == 'gf_edit_forms' && rgget('view') == 'settings' && rgget('subview') == 'settings'){
?>
<script type="text/javascript">
    function ToggleActive(img, form_id){
        var is_active = img.src.indexOf("active1.png") >=0
        if(is_active){
            img.src = img.src.replace("active1.png", "active0.png");
            jQuery(img).attr('title','<?php _e("Inactive", "gravityforms") ?>').attr('alt', '<?php _e("Inactive", "gravityforms") ?>');
            jQuery('span.gform_status').html('<?php _e("Inactive", "gravityforms") ?>');
        }
        else{
            img.src = img.src.replace("active0.png", "active1.png");
            jQuery(img).attr('title','<?php _e("Active", "gravityforms") ?>').attr('alt', '<?php _e("Active", "gravityforms") ?>');
            jQuery('span.gform_status').html('<?php _e("Active", "gravityforms") ?>');
        }

        var mysack = new sack("<?php echo admin_url("admin-ajax.php")?>" );
        mysack.execute = 1;
        mysack.method = 'POST';
        mysack.setVar("action", "rg_update_form_active");
        mysack.setVar("rg_update_form_active", "<?php echo wp_create_nonce("rg_update_form_active") ?>");
        mysack.setVar("form_id", form_id);
        mysack.setVar("is_active", is_active ? 0 : 1);
        mysack.onError = function() { alert('<?php echo esc_js(__("Ajax error while updating form", "gravityforms")) ?>')};
        mysack.runAJAX();

        return true;
    }
</script>
<?php
    }
	return $form;
}