feat: add upload file list with progress (#1825)

frontend/src/i18n/en.json

@@ -100,7 +100,7 @@
     "ru": "Русский",
     "sk": "Slovenčina",
     "svSE": "Swedish (Sweden)",
-    "tr" : "Türkçe",
+    "tr": "Türkçe",
     "ua": "Українська",
     "zhCN": "中文 (简体)",
     "zhTW": "中文 (繁體)"
@@ -151,6 +151,7 @@
     "show": "Show",
     "size": "Size",
     "upload": "Upload",
+    "uploadFiles": "Uploading {files} files...",
     "uploadMessage": "Select an option to upload.",
     "optionalPassword": "Optional password"
   },