@ccagle8
Another option could be excluding/including files in the dropdown by name, doing one of these:
1. list everything but inc-*.php (and functions.php)
+ Rename non-template files to inc-sidebar.php, inc-header.php...
(alternatives: sidebar.inc.php, inc_sidebar.php, etc.)
2. list only template*.php files
+ If you use other template files besides template.php, you'd have to make sure their names begin with "template"
(alternatives: template-name.php, name-template.php, etc.)
Another option could be excluding/including files in the dropdown by name, doing one of these:
1. list everything but inc-*.php (and functions.php)
+ Rename non-template files to inc-sidebar.php, inc-header.php...
(alternatives: sidebar.inc.php, inc_sidebar.php, etc.)
2. list only template*.php files
+ If you use other template files besides template.php, you'd have to make sure their names begin with "template"
(alternatives: template-name.php, name-template.php, etc.)