Brief summary of the bug. What is it ? Where is it ?

When I change myself from a manager to an editor, I am still a manager because i can add and remove users and data sources.

Steps to reproduce:

• Create a new collection
• Go the users tab
• Add another user as a manager (e.g. John)
• Edit my user authorization to be an editor

Actual result:

• I can still remove and add users although i am an editor of the collection

Expected result:

• Since i am an editor, i should not be able to add users or data sources to the collection
• Alternatively, I prevented from editing my self to be an editor/view