[PM-2903] fix : don't set pin if not provided

[arnabrahman]

Type of change

- [X] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

We don't want to set a pin when a user doesn't provide one. This PR addresses #5726

Code changes

When the pin is not given, the modal gets closed but the remaining code is getting executed. So an invalid pin was getting set. Just return from submit function if the pin is not given.

Before

before.webm

After

after.webm

Before you submit

• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team
• Ensure that all UI additions follow WCAG AA requirements

[bitwarden-bot]

Thank you for your contribution! We've added this to our internal Community PR board for review.
ID: PM-2903

[arnabrahman]

Hi @djsmith85 , this has been open for some time. Let me know if i need to do anything.

[eliykat]

Thanks for the fix! I've passed on to our QA team to verify before merging.