working on referenceable locations

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/routes/stock/Locations.svelte

@@ -1,5 +1,5 @@
 <script>
-    import { api } from '../../urls.svelte';
+    import { api, get } from '../../urls.svelte';
     import { error, yikes } from '../../warn.svelte';
     import { t }   from '../../translations.svelte';
 
@@ -41,7 +41,7 @@
             delete location.locations;
         } else {
             const url = api(`stock/locations/below/${location.id}`);
-            const res = await fetch(url,{credentials:'include'});
+            const res = await get(url);
             if (res.ok){
                 yikes();
                 location.locations = await res.json();
@@ -67,11 +67,7 @@
             parent: parent
         }
         const url = api('stock/location');
-        const res = await fetch(url,{
-            credentials: 'include',
-            method: 'POST',
-            body: JSON.stringify(data)
-        });
+        const res = await post(url,data);
         if (res.ok){
             yikes;
             const saved = await res.json();