added error message + translation key

deltachat-ios/Controller/WelcomeViewController.swift

@@ -149,7 +149,7 @@ class WelcomeViewController: UIViewController, ProgressAlertHandler {
             })
         }
 
-        let title = String.localized("error") // TODO: replace with more precise error message when available
+        let title = String.localized("qraccount_creation_failt")
         let alert = UIAlertController(title: title, message: nil, preferredStyle: .alert)
         let okAction = UIAlertAction(
             title: String.localized("ok"),

tools/untranslated.xml

@@ -5,4 +5,5 @@
     <string name="import_contacts">Import device contacts</string>
     <string name="import_contacts_message">To chat with contacts from your device open Settings and enable Contacts.</string>
     <string name="stop_sharing_location">Stop sharing location</string>
+    <string  name="qraccount_config_failt">Account creation failt.</string>
 </resources>