Move project labels to be in top-level navigation

Description

• Move the project labels section to the top-level navigation, so that you have:
  • Overview
  • Repository
  • Issues
  • Merge Requests
  • Labels
  • CI / CD
  • ...
• The Labels navigation item should be visible even if project issues are disabled.
• Everything else remains the same. This is just moving the navigation.

Original description

Description

When you have a project where issues are disabled, it is not possible at this moment to change the labels for this project. The labels fall under the issues group, but they can also be used for the merge requests. By disabling issues it is not possible to manage your labels that you use for you merge requests.

Proposal

Move the management of the labels to a different location, for example somewhere below the general settings