add note about tags to prompt

www/common/common-interface.js

@@ -178,10 +178,14 @@ define([
 
         var tagger = dialog.frame([
             dialog.message([
-                Messages.tags_add,
-                h('p', Messages.tags_searchHint)
+                h('ul', [
+                    Messages.tags_add,
+                    h('br'),
+                    Messages.tags_searchHint,
+                ]),
             ]),
             input,
+            h('center', h('small', Messages.tags_notShared)),
             dialog.nav(),
         ]);