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diff --git a/gn3/templates/common-macros.html b/gn3/templates/common-macros.html
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+{%macro flash_messages()%}
+<div class="alert-messages">
+  {%for category,message in get_flashed_messages(with_categories=true)%}
+  <div class="alert {{category}}" role="alert">{{message}}</div>
+  {%endfor%}
+</div>
+{%endmacro%}