Resolved gh-341 that adds the feature to expand the custom field option far beyond the default. Moved the menu prefix option in to the Joomla component area -> tab -> Settings to allow each component to override the global setting.

admin/sql/updates/mysql/2.9.1.sql

@@ -0,0 +1,3 @@
+ALTER TABLE `#__componentbuilder_joomla_component` ADD `add_menu_prefix` CHAR(1) NOT NULL DEFAULT '' AFTER `add_license`;
+
+ALTER TABLE `#__componentbuilder_joomla_component` ADD `menu_prefix` VARCHAR(100) NOT NULL DEFAULT '' AFTER `license_type`;