ContentType should not be used as default page for folder

[krissik]

How to exclude a content type from beeing used as default page for a folder?

I try to exclude a custom content type from beeing used as a default page for a folder. The problem also exist for default content types like "Link".

What I did:

• go to demo.plone.org
• create folder "test"
• add Link "testlink" in folder "test"
• select "Display" - "Select a content item as default view..." and press "Save" to use "testlink" as default page

What I expect to happen:

I expected that a Link is not in the list of items to select as default page because at "Content Settings" - "Link" the checkbox "Can be used as a default page" is not checked.

What actually happened:

The link is the default page of the folder (indicated by the star in front of it)

What version of Plone/ Addons I am using:

demo.plone.org (Plone 5.1.5 (5115))

[krissik]

It is a bit different for "File" instead of "Link" objects. File objects can not be set as default page with "Display" menu because they are not in the list of available items. But they can be set as default page using "Actions" Menu in folder contents view: