Finalize backport of style fixes to metadata page

Author: giohappy

geonode_mapstore_client/client/themes/geonode/less/_metadata.less

@@ -170,7 +170,7 @@
         padding: 0 0.75rem;
     }
     hr {
-        margin-top: 0 !important;
+        margin-top: 0;
     }
     .field-object-properties {
         padding: 0.75rem 0;
@@ -192,6 +192,7 @@
         grid-template-columns: max-content auto;
         padding: 0 0.75rem;
         dt {
+            min-width: 200px;
             padding: 0.25rem;
             text-align: right;
             grid-column-start: 1;