authPrompt: Don't fail auth prompt until user is out of retries

At the moment we set the state of the auth prompt to failed any
time the user fails an attempt. But verification is still going
on until the user exhausts all attempts, so that's wrong.

This commit changes it to only set the state to failed when the
user is out of tries.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1821>

js/gdm/authPrompt.js

@@ -329,7 +329,9 @@ var AuthPrompt = GObject.registerClass({
 
         this.updateSensitivity(canRetry);
         this.setActorInDefaultButtonWell(null);
-        this.verificationStatus = AuthPromptStatus.VERIFICATION_FAILED;
+
+        if (!canRetry)
+            this.verificationStatus = AuthPromptStatus.VERIFICATION_FAILED;
 
         if (wasQueryingService)
             Util.wiggle(this._entry);