feat: add button to navigate up to .. (parent dir)

frontend/src/i18n/en.json

@@ -32,6 +32,7 @@
     "selectMultiple": "Select multiple",
     "share": "Share",
     "shell": "Toggle shell",
+    "gotoParent": "Open parent dir",
     "submit": "Submit",
     "switchView": "Switch view",
     "toggleSidebar": "Toggle sidebar",

frontend/src/views/files/Listing.vue

@@ -46,7 +46,12 @@
             show="delete"
           />
         </template>
-
+        <action
+          v-if="headerButtons.gotoParent"
+          icon="arrow_upward"
+          :label="$t('buttons.gotoParent')"
+          @action="gotoParent"
+        />
         <action
           v-if="headerButtons.shell"
           icon="code"
@@ -367,6 +372,7 @@ export default {
     },
     headerButtons() {
       return {
+        gotoParent: true,
         upload: this.user.perm.create,
         download: this.user.perm.download,
         shell: this.user.perm.execute && enableExec,
@@ -853,6 +859,14 @@ export default {
       this.setItemWeight();
       this.fillWindow();
     },
+
+    gotoParent: function() {
+      const url = (window.location.pathname || "")
+      const parts = url.replace(/\/$/, '').split('/');
+      parts.pop();
+      const parentUrl = parts.join('/');
+      this.$router.push({ path: parentUrl });
+    },
     upload: function () {
       if (
         typeof window.DataTransferItem !== "undefined" &&