feat: Re-add warning if place not found

src/fellchensammlung/static/fellchensammlung/css/styles.css

@@ -963,6 +963,14 @@ div.announcement {
     border: rgba(17, 58, 224, 0.51) 4px solid;
 }
 
+.error {
+    color: #370707;
+    font-weight: bold;
+}
+
+.error::before {
+    content: "⚠️";
+}
 
 /*******/
 /* MAP */

src/fellchensammlung/templates/fellchensammlung/search.html

@@ -30,6 +30,11 @@
                     {% endif %}
                 {% endif %}
             </div>
+        {% if place_not_found %}
+            <p class="error">
+                {% trans 'Ort nicht gefunden' %}
+            </p>
+        {% endif %}
         </form>
         <div class="card half">
             {% include "fellchensammlung/partials/partial-map.html" %}