hide group's issues menu entry when there is no issue
Summary
At group level, the issues
menu entry still shows up even if there is no issue in contained projects (or no project at all).
Steps to reproduce
Create an empty group : https://gitlab.com/group-zero-issue
Example Project
https://gitlab.com/group-zero-issue
What is the current bug behavior?
group's Issues
menu entry shows up whenever there is no issue in projects contained in that group
What is the expected correct behavior?
group's Issues
menu entry is hidden when there is no issue in the group
Relevant logs and/or screenshots
Output of checks
This bug happens on GitLab.com and self-hosted (core)