Merge branch 'fix-tooltip-flicker' into 'master'

Fix tooltip flicker

Closes #48614

See merge request gitlab-org/gitlab-ce!20270

app/assets/stylesheets/bootstrap_migration.scss

@@ -128,6 +128,11 @@ table {
   border-spacing: 0;
 }
 
+.tooltip {
+  // Fix bootstrap4 bug whereby tooltips flicker when they are hovered over their borders
+  pointer-events: none;
+}
+
 .popover {
   font-size: 14px;
 }

changelogs/unreleased/fix-tooltip-flicker.yml

+---
+title: Fix tooltip flickering bug
+merge_request:
+author:
+type: fixed