Fix tooltip for Copy to clipboard button.

Fix "Copy to clipboard" tooltip to say "Copied!" when clipboard button
is clicked.

Closes #22022

CHANGELOG

@@ -22,6 +22,7 @@ v 8.13.0 (unreleased)
   - Fix broken repository 500 errors in project list
 
 v 8.12.4 (unreleased)
+  - Fix "Copy to clipboard" tooltip to say "Copied!" when clipboard button is clicked. (lukehowell)
 
 v 8.12.3
   - Update Gitlab Shell to support low IO priority for storage moves

app/assets/javascripts/copy_to_clipboard.js

@@ -26,15 +26,15 @@
   };
 
   showTooltip = function(target, title) {
-    return $(target).tooltip({
-      container: 'body',
-      html: 'true',
-      placement: 'auto bottom',
-      title: title,
-      trigger: 'manual'
-    }).tooltip('show').one('mouseleave', function() {
-      return $(this).tooltip('hide');
-    });
+    var $target = $(target);
+    var originalTitle = $target.data('original-title');
+
+    $target
+      .attr('title', 'Copied!')
+      .tooltip('fixTitle')
+      .tooltip('show')
+      .attr('title', originalTitle)
+      .tooltip('fixTitle');
   };
 
   $(function() {