Merge branch 'active-element-tooltip' into 'master'

Do not show tooltip for active element

## What does this MR do?

Change Bootstrap's default for tooltips to display them only when hovering and not for the active element.

See also here: https://getbootstrap.com/javascript/#tooltips-options

## Screenshots

### Before

![before](/uploads/c5b7bd9eba07ca61bfa5ba014d08dd1a/before.webm)

### After

![after](/uploads/d8c4a69e5a6797d8d26ab92cb96fcb2d/after.webm)

## What are the relevant issue numbers?

Closes #23794

See merge request !7105

CHANGELOG.md

@@ -20,6 +20,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 - Removed delete branch tooltip !6954
 - Stop unauthorized users dragging on milestone page (blackst0ne)
 - Restore issue boards welcome message when a project is created !6899
+- Do not show tooltip for active element !7105 (winniehell)
 - Escape ref and path for relative links !6050 (winniehell)
 - Fixed link typo on /help/ui to Alerts section. !6915 (Sam Rose)
 - Fix filtering of milestones with quotes in title (airatshigapov)

app/assets/javascripts/application.js

@@ -188,6 +188,7 @@
     // Close select2 on escape
     });
     // Initialize tooltips
+    $.fn.tooltip.Constructor.DEFAULTS.trigger = 'hover';
     $body.tooltip({
       selector: '.has-tooltip, [data-toggle="tooltip"]',
       placement: function(_, el) {