fix: API get_view_name display the proper name for actions

[nlgotz]

Closes #5595

What's Changed

• Updates get_view_name() to get the view's name 1st if it exists.
• Updates get_view_name() to check if it's not a detail view and get the model's verbose_name_plural name instead of the verbose_name
• Update @action decorators that have a function with a multipart name to add in the name arg so that the Extra Action displays nicely

Screenshots

Before:

After:

TODO

• Explanation of Change(s)
• Added change log fragment(s) (for more information see the documentation)
• Attached Screenshots, Payload Example
• Unit, Integration Tests
• Documentation Updates (when adding/changing features)
• Example App Updates (when adding/changing features)
• Outline Remaining Work, Constraints from Design

[glennmatthews]

Thanks!