Fixed UI test problems introduced after the accessibility identifier … (#586)

* Fixed UI test problems introduced after the accessibility identifier changes
* Disable parallel UITests, they don't seem to work properly
* Fix UITests `elementFallbackLanguage`

UITests/Sources/Application.swift

@@ -24,7 +24,10 @@ struct Application {
             "IS_RUNNING_UI_TESTS": "1",
             "UI_TESTS_SCREEN": identifier.rawValue
         ]
+        
+        // Use the same fallback language as the real app so translation comparison works
         Bundle.elementFallbackLanguage = "en"
+        
         app.launch()
         return app
     }