[Mobile Payments] - Delay dismissing numeric keyboard after dismissing a simple payment

[jostnes]

Describe the bug When dismissing a simple payment/order using the Cancel button, there is a slight delay before the keyboard is hidden from view but when using the swipe down to dismiss gesture, it is dismissed almost immediately

To Reproduce Steps to reproduce the behavior:

1. Login with a store with IPP
2. Go to Menu > Payments
3. Tap on Collect Payment
4. On Take Payment screen, tap on Cancel
5. See that there is a delay before the numeric keyboard is dismissed from view

Screenshots

https://user-images.githubusercontent.com/17252150/184801329-6692a3d7-925e-49b7-9769-43341f4023d7.MP4

Expected behavior There shouldn't be a delay to dismiss the keyboard

Isolating the problem (mark completed items with an [x]):

• [ ] I have deactivated other plugins and confirmed this bug occurs when only WooCommerce plugin is active.
• [ ] This bug happens with a default WordPress theme active, or Storefront.
• [x] I can reproduce this bug consistently using the steps above.

Mobile Environment Please include:

• Device: iPhone 13 mini
• iOS version: 15.5
• WooCommerce iOS version: Alpha version pr7473-ff6d916 / also reproducible on WCiOS 9.8

WordPress Environment

``` Copy and paste the system status report from **WooCommerce > System Status** in WordPress admin. ```

[rachelmcr]

This also came up in https://github.com/woocommerce/woocommerce-ios/pull/8451#issuecomment-1363461274 (PR review for unrelated changes). In that case, the keyboard seemed to get stuck and the entire screen froze, rather than dismissing it.