**app/assets/javascripts/feature_flags/components/feature_flags.vue:**
**spec/frontend/feature_flags/components/feature_flags_spec.js:**

Implement disabling of add button with tool tip when limit reached.

**locale/gitlab.pot:**
**app/assets/javascripts/feature_flags/index.js:**
**app/views/projects/feature_flags/index.html.haml:**
**changelogs/unreleased/feature-flag-limits-ux.yml:**

Boilerplate.

**doc/operations/feature_flags.md:**

Documentation.