Replace custom styling with link styled button

[fscholdei]

Proposed changes

Replace custom styling with link styled button, see https://github.com/scm-manager/scm-manager/pull/2016

Your checklist for this pull request

Contributor:

• [x] PR is well described and the description can be used as a commit message on squash
• [x] Related issues linked to PR if existing and labels set
• [ ] New code is covered with unit tests
• [ ] New/updated ui components are tested inside the storybook (module ui-components only)
• [x] Changelog entry file created in gradle/changelog
• [ ] Feature has been tested with different permissions
• [ ] Documentation updated (only necessary for new features or changed behaviour)

Reviewer:

• [ ] The clean code principles are respected (CleanCode)
• [ ] All new code/logic is implemented on the right spot / "Should this be done here?"
• [ ] UI changes fits into the layout
• [ ] The UI views / components are responsive (mobile views)
• [ ] Correct translations are available

Checklist for branch merge request (not required for forks)

• [ ] Branch is green/blue on Jenkins
• [ ] Quality Gate passed on SonarQube