Fix history page blank bug if google api key not present

templates/history.html

@@ -60,7 +60,11 @@ <h4 style="text-align: center;">Incident Map</h4>
           <div class="row">
               <div class="col-md-12"><div class="map" id="map"></div></div>
           </div>
-          {%endif%}
+        {% else %}
+           <div class="row">
+              <div class="col-md-12"><p id="map-no-key">The Incident Map could not be displayed because a valid Google Maps API key could not be found. This can be added to the <code>frontend.env</code> file.</p></div>
+          </div>
+        {%endif%}
         </div>
         <div class="col-sm-6 incident-size">
         {% if (canarydrop['triggered_list']|length) > 0 %}
@@ -422,6 +426,11 @@ <h4 style="text-align: center;">Incident List is Currently Empty</h4>
     </script>
   {% if API_KEY %}
   <script src="https://maps.googleapis.com/maps/api/js?key={{API_KEY}}&callback=initMap" async defer></script>
+  {% else %}
+  <script>
+    $('#incidents').parent().parent().show();
+    $('#map-no-key').parent().parent().parent().show();
+  </script>
   {%endif%}
   </body>
 </html>