Merge branch 'fix-alert-colors' into 'master'

Fix alert colors

Closes #47983

See merge request gitlab-org/gitlab-ce!19905

app/assets/stylesheets/bootstrap_migration.scss

@@ -259,15 +259,36 @@ pre code {
   white-space: pre-wrap;
 }
 
+.alert,
+.flash-notice {
+  border-radius: 0;
+}
+
+.alert-success {
+  background-color: $green-500;
+  border-color: $green-500;
+}
+
+.alert-info {
+  background-color: $blue-500;
+  border-color: $blue-500;
+}
+
+.alert-warning {
+  background-color: $orange-500;
+  border-color: $orange-500;
+}
+
 .alert-danger {
   background-color: $red-500;
   border-color: $red-500;
 }
 
+.alert-success,
+.alert-info,
 .alert-warning,
 .alert-danger,
 .flash-notice {
-  border-radius: 0;
   color: $white-light;
 
   h4,

app/views/help/ui.html.haml

@@ -443,8 +443,6 @@
     .col-md-6
       .alert.alert-success
         = lorem
-      .alert.alert-primary
-        = lorem
       .alert.alert-info
         = lorem
     .col-md-6