fix: allow booking the free part of a partly booked day

templates/board/plan/_desk.html.twig

@@ -21,8 +21,8 @@
 
     {% for resource in resources %}
         {% if resource.svgElementId and geometry[resource.svgElementId] is defined %}
-            {{ plan.spot(resource, geometry[resource.svgElementId], 140, 70,
-                bookings_by_resource[resource.id]|default([]), selected_date, is_past, time_params) }}
+            {{ plan.spot(spots[resource.id], geometry[resource.svgElementId], 140, 70,
+                selected_date, is_past, time_params) }}
         {% endif %}
     {% endfor %}
 </svg>