opt.: file view (#249)

lib/l10n/app_en.arb

@@ -208,6 +208,7 @@
   "sftpSSHConnected": "SFTP Connected",
   "showDistLogo": "Show distribution logo",
   "shutdown": "Shutdown",
+  "size": "Size",
   "snippet": "Snippet",
   "speed": "Speed",
   "spentTime": "Spent time: {time}",
@@ -229,6 +230,7 @@
   "textScalerTip": "1.0 => 100% (original size), only works on server page part of the font, not recommended to change.",
   "theme": "Theme",
   "themeMode": "Theme mode",
+  "time": "Time",
   "times": "Times",
   "traffic": "Traffic",
   "ttl": "ttl",