opt.: custom terminal emulator (#771)

lib/l10n/app_en.arb

@@ -32,6 +32,7 @@
   "decode": "Decode",
   "decompress": "Decompress",
   "deleteServers": "Batch delete servers",
+  "desktopTerminalTip": "Command used to open the terminal emulator when launching SSH sessions.",
   "dirEmpty": "Make sure the folder is empty.",
   "disconnected": "Disconnected",
   "disk": "Disk",
@@ -48,6 +49,7 @@
   "editVirtKeys": "Edit virtual keys",
   "editor": "Editor",
   "editorHighlightTip": "The current code highlighting performance is not ideal and can be optionally turned off to improve.",
+  "emulator": "Emulator",
   "encode": "Encode",
   "envVars": "Environment variable",
   "experimentalFeature": "Experimental feature",