UserGroupView missing alertTemplate

[mamelara]

Describe the bug
When testing out the groups view under settings, I noticed there was an Uncaught error happening when a team save fails:

UserGroupView.js?v=2.22.0:260 Uncaught TypeError: this.alertTemplate is not a function
    at n.showAlert (UserGroupView.js?v=2.22.0:260:11)
    at error (UserGroupView.js?v=2.22.0:235:11)
    at Object.error (UserGroup.js?v=2.22.0:223:7)
    at c (jquery-1.9.1.min.js?v=2.22.0:3:7857)
    at Object.fireWith [as rejectWith] (jquery-1.9.1.min.js?v=2.22.0:3:8658)
    at k (jquery-1.9.1.min.js?v=2.22.0:5:14040)
    at XMLHttpRequest.r (jquery-1.9.1.min.js?v=2.22.0:5:18226)

After some further debugging it looks like when UserGroupView was extracted from UserView, the alertTemplate was missed in the refactor. It is still present in UserView but should be moved to the UserGroupView class.

To Reproduce
Steps to reproduce the behavior:

1. In order to enforce a failure, you will want to change the url arg in the ajax call in UserGroup to point to a different URL that would produce a save error.
2. Go to settings page and click on groups
3. Open up console and create a new group, you should see the same error

Expected behavior
An alert banner should be raised when a group is failed to be created

[robyngit]

Thank you for the detailed issue report, @mamelara! This will be fixed on the next release.