bugfix: stopping event from bubbling up on item drag and drop

frontend/src/routes/stock/Locations.svelte

@@ -43,6 +43,13 @@
         new_location_name = '';
     }
 
+    function onDrop(ev, new_loc){
+        ev.preventDefault();
+        ev.stopPropagation();
+        move_dragged_to(new_loc);
+        return false;
+    }
+
     async function onSet(new_location_name){
         const data = {
             name: new_location_name,
@@ -96,7 +103,7 @@
     <li onclick={e => toggleChildren(e, location)}
         class="{location.locations?'expanded':'collapsed'} {location.highlight?'highlight':null}"
         ondragover={e => drag_over(e,location)}
-        ondrop={e => move_dragged_to(location)}
+        ondrop={e => onDrop(e,location)}
         ondragleave={e => delete location.highlight}>
         <span class="name">{location.name}</span>
         {#if location.locations}