Added .closest() to find Reply button on click; fixes #401

This is to fix the issue where the icon-comment icon is clicked in the
Reply button of a note; the icon is used as the target and incorrectly
assumed to be the button itself, which causes the reply form to spawn
inside the button.

CHANGELOG

@@ -19,6 +19,7 @@ v 7.1.0
   - Fix LDAP TLS authentication (Boris HUISGEN)
   - Show VERSION information on project sidebar
   - Improve branch removal logic when accept MR
+  - Fix bug where comment form is spawned inside the Reply button
 v 7.0.0
   - The CPU no longer overheats when you hold down the spacebar

app/assets/javascripts/notes.js.coffee

@@ -376,7 +376,7 @@ class Notes
   ###
   replyToDiscussionNote: (e) =>
     form = $(".js-new-note-form")
-    replyLink = $(e.target)
+    replyLink = $(e.target).closest(".js-discussion-reply-button")
     replyLink.hide()
     # insert the form after the button