Operations dashboard buttons are duplicated on navbar on mobile

Summary

Operations dashboard buttons are duplicated on navigation bar on mobile.

What is the current bug behavior?

screen size img
mobile (Medium of Bootstrap grid) gitlab-dashboard-w800
PC (just for reference) gitlab-dashboard-w1200

What is the expected correct behavior?

screen size img
mobile (Medium of Bootstrap grid) gitlab-dashboard-w800-after
PC (just for reference) gitlab-dashboard-w1200-after

Output of checks

This bug happens on GitLab.com (11.10.0-rc6-ee).