fix sorting

front/js/svelte/edges/sortEdges.js

@@ -1,16 +1,21 @@
 export function sortByField(from, to, edges, fieldName) {
-    console.log(from)
-    console.log(to)
     if (from === to) {
         return edges;
     }
+    let edgesTosort = edges?.filter((ed) => ed.field === fieldName && ed.depth === 1) ?? [];
+    let remainingEdge = edges?.filter((ed) => !(ed.field === fieldName && ed.depth === 1)) ?? [];
 
-    let edgesTosort = edges?.filter((ed) => ed.field === fieldName) ?? [];
-    let remainingEdge = edges?.filter((ed) => ed.field !== fieldName) ?? [];
-
-    let fromElem = edgesTosort.splice(from, 1)[0];
-    edgesTosort.splice(to, 0, fromElem);
-
+    edgesTosort = array_move(edgesTosort,from, to);
     return [...remainingEdge, ...edgesTosort];
-
 }
+
+function array_move(arr, old_index, new_index) {
+    if (new_index >= arr.length) {
+        var k = new_index - arr.length + 1;
+        while (k--) {
+            arr.push(undefined);
+        }
+    }
+    arr.splice(new_index, 0, arr.splice(old_index, 1)[0]);
+    return arr; // for testing
+};