Success message when removing admin role of the last admin of the site

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, 7.2.X, Master
• Fix Version/s: 7.1.10 DXP FP17, 7.1.10.4 SP4, 7.1.X, 7.2.10 DXP FP4, 7.2.X, 7.3.0 CE GA1, Master
• Component/s: User Management > Roles
• Labels:
  • INACTIVE
  • ee-ts
  • liferay-dxp-71-sp4
  • liferay-fixpack-dxp-17-7110
  • liferay-fixpack-dxp-4-7210
• Branch Version/s:
  7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Sprint: U&SM| S03 Sprint11 | 11.12-26
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/81209

Steps to reproduce:

1. Create a user and set as Admin (name it "adminTestUser")
2. Remove all the admins of the site except "adminTestUser"
3. Revoke this role to "adminTestUser"

Expected: Since portal prevents this role to be removed to the last admin, we should inform to the user about this

Current: User can remove Administrator role by clicking the X icon next to it. Upon saving, success message will display but the Administrator role will remain. Please see attached gif.