Fix CSS selector priority for elements in gr-create-pointer-dialog

Bug: Issue 12177
Change-Id: Ie155009a816a0e1dbce64260b26f0a3547e757a3
diff --git a/polygerrit-ui/app/elements/admin/gr-create-pointer-dialog/gr-create-pointer-dialog.html b/polygerrit-ui/app/elements/admin/gr-create-pointer-dialog/gr-create-pointer-dialog.html
index 5a9213b..d1980a5 100644
--- a/polygerrit-ui/app/elements/admin/gr-create-pointer-dialog/gr-create-pointer-dialog.html
+++ b/polygerrit-ui/app/elements/admin/gr-create-pointer-dialog/gr-create-pointer-dialog.html
@@ -38,7 +38,10 @@
       input {
         width: 20em;
       }
-      .hideItem {
+      /* Add css selector with #id to increase priority
+      (otherwise ".gr-form-styles section" rule wins) */
+      .hideItem,
+      #itemAnnotationSection.hideItem {
         display: none;
       }
     </style>