Steps to reproduce the issue

Setup some menu items which consist of:

• article
• text separator
• menu heading
• alias
• url
• article

Expected result

When creating a menu module, selecting the "Base Item" option should display all menu items.

Actual result

When creating a menu module, selecting the "Base Item" option only shows menu items which point to a component (article, category etc...)

System information (as much as possible)

Database Version: 5.6.35
PHP Version: 7.0.14
Web Server: Apache
Joomla! Version: Joomla! 3.7.0 Stable [ Amani ] 25-April-2017 15:36 GMT
Joomla! Platform Version: Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT

Additional comments

Testing this in Joomla 3.6.5, the base item option lists menu items of all types. After upgrading from Joomla 3.6.5 to Joomla 3.7 it has broken a couple of my menu modules. I have a list of menu items which are children of my "Heading" menu. I was using the module to list only child items of my "Heading" menu but I can no longer select this menu item in the modal to achieve this.