Action displayAsForm not displaying correctly as inline or in dropdown for index entity actions

[yalit]

I was trying to use the outcome of the PR linked to the #6826 issue and I found that :

• it's not displayed properly for inline actions on the index table lines
• on the dropdown action (on an entity line), no other display than a link is possible (not even a custom templatePath)

So, I suggest to add proper display support for the "form" (or POST) action in the entity lines whether in the dropdown or for inline actions.