Enable "Add key" button when user fills in a proper key

Closes #4295

CHANGELOG

@@ -10,6 +10,9 @@ v 8.4.0 (unreleased)
   - Add CAS support (tduehr)
   - Add link to merge request on build detail page.
 
+v 8.3.2 (unreleased)
+  - Enable "Add key" button when user fills in a proper key
+
 v 8.3.1
   - Fix Error 500 when global milestones have slashes (Stan Hu)
 

app/views/profiles/keys/new.html.haml

@@ -12,6 +12,6 @@
         comment = val.match(/^\S+ \S+ (.+)\n?$/);
 
     if( comment && comment.length > 1 && title.val() == '' ){
-      $('#key_title').val( comment[1] );
+      $('#key_title').val( comment[1] ).change();
     }
   });