fix: allow to edit amount after quick scan

[Syn-McJ]

Issue being fixed or feature implemented

If a QR code with an amount specified is scanned, the app shows the confirmation dialog immediately but it should redirect to the "enter amount" screen and allow to modify the amount.

What was done?

• Redirect to the "enter amount" screen for QR scanned payment intents.
• Pre-set the initial amount on the "enter amount" screen.

How Has This Been Tested?

QA

Breaking Changes

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[pankcuf]

LGTM