improve error message to make it clearer things not saved

Author: struan

crowdsourcer/templates/crowdsourcer/authority_audit_questions.html

@@ -40,7 +40,7 @@ <h3 class="mb-4 mb-md-5 text-success">
         {% if form.total_error_count > 0 %}
           <div class="mb-4">
               <div class="col-md-7 text-danger">
-                There were some errors which are highlighted in red below.
+                <strong>Changes Not Saved</strong>. There were some errors which are highlighted in red below.
               </div>
           </div>
         {% endif %}

crowdsourcer/templates/crowdsourcer/authority_questions.html

@@ -46,7 +46,7 @@ <h3 class="mb-4 mb-md-5 text-success">
         {% if form.total_error_count > 0 %}
           <div class="mb-4">
               <div class="col-md-7 text-danger">
-                There were some errors which are highlighted in red below.
+                <strong>Changes Not Saved</strong>. There were some errors which are highlighted in red below.
               </div>
           </div>
         {% endif %}

crowdsourcer/templates/crowdsourcer/authority_questions_with_previous.html

@@ -47,7 +47,7 @@ <h3 class="mb-4 mb-md-5 text-success">
         {% if form.total_error_count > 0 %}
           <div class="mb-4">
               <div class="col-md-7 text-danger">
-                There were some errors which are highlighted in red below.
+                <strong>Changes Not Saved</strong>. There were some errors which are highlighted in red below.
               </div>
           </div>
         {% endif %}