Apply new GitLab UI for input field in admin/labels

app/views/admin/labels/_form.html.haml

@@ -5,12 +5,12 @@
     .col-sm-2.col-form-label
       = f.label :title
     .col-sm-10
-      = f.text_field :title, class: "form-control", required: true
+      = f.text_field :title, class: "form-control gl-form-input", required: true
   .form-group.row
     .col-sm-2.col-form-label
       = f.label :description
     .col-sm-10
-      = f.text_field :description, class: "form-control js-quick-submit"
+      = f.text_field :description, class: "form-control gl-form-input js-quick-submit"
   .form-group.row
     .col-sm-2.col-form-label
       = f.label :color, _("Background color")
@@ -18,7 +18,7 @@
       .input-group
         .input-group-prepend
           .input-group-text.label-color-preview  
-        = f.text_field :color, class: "form-control"
+        = f.text_field :color, class: "form-control gl-form-input"
       .form-text.text-muted
         = _('Choose any color.')
         %br