Should not allow user to tap "Sign in with Google" when a signing is in progress

[whchan]

• Objective C or Swift: Swift
• iOS version: 10.3.2
• Firebase SDK version: latest release
• FirebaseUI version: latest release
• CocoaPods Version: latest release

Step 3: Describe the problem:

Steps to reproduce:

1. Show picker view screen
2. tap google, then login
3. Show picker view with a progress bar.

Observed Results:

User can tab the login buttons even though previous is already in progress.

Expected Results:

User cannot tab any login buttons

[yramanchuk]

@whchan Thanks for the feedback.
I will review issue with our UX designer, probably will add transparent view below activity indicator.

[yramanchuk]

Fixed in FirebaseUI 4.4.1