Wire up tsx lexer for i18next-parser and add missing string

i18next-parser.config.js

@@ -10,7 +10,14 @@ export default {
       {
         lexer: "JavascriptLexer",
         functions: ["t", "translatedError"],
-        functionsNamespace: ["useTranslation", "withTranslation"],
+        namespaceFunctions: ["useTranslation", "withTranslation"],
+      },
+    ],
+    tsx: [
+      {
+        lexer: "JsxLexer",
+        functions: ["t", "translatedError"],
+        namespaceFunctions: ["useTranslation", "withTranslation"],
       },
     ],
   },

public/locales/en-GB/app.json

@@ -104,6 +104,7 @@
   "Submitting…": "Submitting…",
   "Thanks, we received your feedback!": "Thanks, we received your feedback!",
   "Thanks!": "Thanks!",
+  "This application has been opened in another tab.": "This application has been opened in another tab.",
   "This call already exists, would you like to join?": "This call already exists, would you like to join?",
   "This site is protected by ReCAPTCHA and the Google <2>Privacy Policy</2> and <6>Terms of Service</6> apply.<9></9>By clicking \"Register\", you agree to our <12>End User Licensing Agreement (EULA)</12>": "This site is protected by ReCAPTCHA and the Google <2>Privacy Policy</2> and <6>Terms of Service</6> apply.<9></9>By clicking \"Register\", you agree to our <12>End User Licensing Agreement (EULA)</12>",
   "Unmute microphone": "Unmute microphone",