Feat: add cancel button for contact editing

[max65482]

Fixes #4538

[hamza221]

Thank you for the Pr,
It looks good to me aside from one point,
On creating a new contact I would expect Cancel to cancel the creation of the contact aka delete the contact.
Maybe we should not show the button for contacts that are just created ? what do you think ?

[codecov]

Codecov Report

❌ Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/components/ContactDetails.vue	0.00%	10 Missing ⚠️
src/store/contacts.js	0.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[max65482]

I agree that the cancel button could be misunderstood when editing newly created contacts. I removed it in this case.

[hamza221]

LGTM aside from a couple questions

[hamza221]

I only squashed the commits

[welcome]

Thanks for your first pull request and welcome to the community! Feel free to keep them coming! If you are looking for issues to tackle then have a look at this selection: https://github.com/nextcloud/contacts/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22

[max65482]

@hamza221 Thanks for reviewing an merging! Should this be backported?

[hamza221]

@hamza221 Thanks for reviewing an merging! Should this be backported?

We usually don't backport features, but good news this is already pre-released v8.3.0-rc.1