automatically detect file encoding when importing delimiter-separated values (DSV) file

src/locales/zh_Hans.json

@@ -1443,6 +1443,7 @@
     "No results": "无结果",
     "Unknown": "未知",
     "Auto detect": "自动检测",
+    "Detecting...": "正在检测...",
     "Miscellaneous": "杂项",
     "Default": "默认",
     "Included": "包含",
@@ -1896,6 +1897,7 @@
     "Data File": "数据文件",
     "Data to import": "要导入的数据",
     "Please select a file to import": "请选择要导入的文件",
+    "Unable to detect the file encoding automatically. Please select the actual encoding.": "无法自动检测文件编码。请选择实际的编码。",
     "Include Header Line": "包含标题行",
     "Time Format": "时间格式",
     "Amount Format": "金额格式",