When deciding if users/groups can be deleted, check for Manager role directly.

Supports a usecase where portal_roles() is overridden to exclude 'Manager' so
that Site Administrators are not confused by a column that they cannot
influence.
Preparing release 2.3.5
Back to development: 2.3.6
fix get_display_pub_date_in_byline refs https://dev.plone.org/ticket/13604
Merge pull request #13 from maartenkling/master

Fix get_display_pub_date_in_byline when upgrading your site
Preparing release 2.3.6
Back to development: 2.3.7
Fix broken msgid
Don't display the upgrade portal message unless the logged in user actually has the permission to upgrade the portal. No one likes a tease.
Merge pull request #14 from eleddy/master

Permission check on upgrade messages
improve display of user and group names

* show login name instead of user id
* show user id as tooltip
* don't show group name if it's the same as the group title
Preparing release 2.3.7
Back to development: 2.3.8
fix syndication settings to not write on read
fix tests for p5
Support UUID user ids and improve email as login.

When switching on the 'Use email address as login name' option in
the security control panel, automatically update PAS to use
lowercase login names and migrate the existing login names.

Add 'Use UUID user ids' option in security control panel.

Both are part of PLIP 13419.
Update version to 2.4.x.

There is already a 2.3.x branch for Plone 4.2 and 4.3.
Remove hardcoded column styling in control panel overview.
Add changelog entry.
Adapt tests to the plonetheme.classic removal in Plone 5.