Fix #1705: Fix incorrect title when changing monthly AC payment value

[kylehickinson]

Summary of Changes

This pull request fixes issue #1705

Submitter Checklist:

• Unit Tests are updated to cover new or changed functionality
• User-facing strings use NSLocalizableString()

Test Plan:

• View the monthly payment setting screen in Auto Contribute settings, verify title is not recurring tips
• Setup a recurring tip on a user, verify when trying to edit said tip amount from the main wallet panel that it's title is "recurring tip" still

Reviewer Checklist:

• Issues include necessary QA labels:
  • QA/(Yes|No)
  • release-notes/(include|exclude)
  • bug / enhancement
• Necessary security reviews have taken place.
• Adequate unit test coverage exists to prevent regressions.
• Adequate test plan exists for QA to validate (if applicable).
• Issue is assigned to a milestone (should happen at merge time).