Adding missing sorting for countries

frontend/src/routes/guest/register/registerPage.tsx

@@ -298,6 +298,13 @@ const GuestRegisterStep = forwardRef(
                         ]
                         return countryTuple
                       })
+                      .filter(
+                        (countryTuple: [string, string]) =>
+                          // All countries are expected to have a name, this filtering
+                          // is here to make some tests run in an environment where the
+                          // internationalization is not set up
+                          countryTuple[1] !== undefined
+                      )
                       .sort(
                         (
                           countryTuple1: [string, string],