gui: Add missing strings to lang-en.json

gui/default/assets/lang/lang-en.json

@@ -52,6 +52,8 @@
    "Downloaded": "Downloaded",
    "Downloading": "Downloading",
    "Edit": "Edit",
+   "Edit Device": "Edit Device",
+   "Edit Folder": "Edit Folder",
    "Editing": "Editing",
    "Enable NAT traversal": "Enable NAT traversal",
    "Enable Relaying": "Enable Relaying",