Fixed radio buttons conditioning to not allow admins change their own permissions

app/views/admin/users/_access_levels_ee.html.haml

@@ -11,24 +11,17 @@
   .form-group
     = f.label :access_level, class: 'control-label'
     .col-sm-10
-      = f.radio_button :access_level, :regular, checked: true
+      = f.radio_button :access_level, :regular, disabled: (current_user == @user && @user.is_admin?)
       = label_tag :regular do
         Regular
       %p.light
         Regular users have access to their groups and projects
       - if license_allows_auditor_user?
-        = f.radio_button :access_level, :auditor
+        = f.radio_button :access_level, :auditor, disabled: (current_user == @user && @user.is_admin?)
         = label_tag :auditor do
           Auditor
         %p.light
           Auditors have read-only access to all groups, projects and users
-      - if current_user == @user
-        = f.radio_button :access_level, :admin
-        = label_tag :admin do
-          Admin
-        %p.light
-          You cannot remove your own admin rights
-      - else
       = f.radio_button :access_level, :admin
       = label_tag :admin do
         Admin