Hides tooltip on discussion toggle button when clicking

Closes #20750

CHANGELOG

@@ -29,6 +29,7 @@ v 8.12.0 (unreleased)
   - Fix bug where pagination is still displayed despite all todos marked as done (ClemMakesApps)
   - Request only the LDAP attributes we need !6187
   - Center build stage columns in pipeline overview (ClemMakesApps)
+  - Fix bug with tooltip not hiding on discussion toggle button
   - Rename behaviour to behavior in bug issue template for consistency (ClemMakesApps)
   - Remove suggested colors hover underline (ClemMakesApps)
   - Shorten task status phrase (ClemMakesApps)

app/assets/javascripts/application.js

@@ -251,6 +251,7 @@
       } else {
         notesHolders.hide();
       }
+      $this.trigger('blur');
       return e.preventDefault();
     });
     $document.off("click", '.js-confirm-danger');