Fix: Directories cant be deleted

src/lib/RessourceManager.svelte

@@ -108,12 +108,13 @@
     }
 
     async function deleteDir() {
+        if (dirToDelete === undefined) return false;
         return axios
             .delete(url("/directory"), {
                 headers: {
                     "Content-Type": "application/json"
                 },
-                data: { path: path + (path === "/" ? "" : "/") + dirToDelete?.name },
+                data: { path: path + (path === "/" ? "" : "/") + dirToDelete.name },
                 withCredentials: true
             })
             .then((response) => {
@@ -255,7 +256,7 @@
         newFileName = "";
     }
 
-    function cancel() {
+    function closeRessourceManager() {
         selectedRessource = undefined;
     }
 
@@ -272,7 +273,7 @@
         if (selectedRessource) ok({ ...selectedRessource });
         return true;
     }}
-    cancelFn={cancel}
+    oncloseFn={closeRessourceManager}
     okButtonText={selectedRessource !== undefined ? selectedRessource.name : "Ok"}
     width="90%"
     height="90%"
@@ -331,6 +332,9 @@
                                         if (isRessource(ressource)) {
                                             showDeleteRessource = true;
                                             resToDelete = ressource;
+                                        } else if (isDir(ressource)) {
+                                            dirToDelete = ressource;
+                                            showDeleteDir = true;
                                         }
                                     }}><i class="fa-solid fa-trash"></i></button
                                 >