Pull request for #32732

The batch process on users lets you remove a user from a group. But it doesn't check to make sure that the user is still in at least one group.

To test

Test 1

1. Create a new user and put them in the registered usergroup
2. Using the batch process try to remove them from the registered usergroup

Before

Success message and user not in any group

After

Batch process failed with following error: A user must belong to at least one group.

Test 2

1. Create a new user and put them in the registered AND author usergroup
2. Using the batch process try to remove them from the editor usergroup

Before

Success message and user still in the registered and author usergroups

After

Batch process failed with following error: The selected user(s) are not in the selected group.

Test 3

1. Create a new user and put them in the registered AND author usergroup
2. Using the batch process try to remove them from the registered usergroup

Before

Success message and user only in the author usergroup

After

Success message and user only in the author usergroup

Comments

This type of code is really not my strong point - it may need optimizing etc