Load the "New Branch" button asynchronously

This button depends on Issue#can_be_worked_on? which in turn depends on
Issue#related_branches. By rendering this button asynchronously we can
finally remove all usages of Issue#related_branches and
Issue#referenced_merge_requests from the issues "show" page.

1 files changed, 1 insertions, 0 deletions

diff --git a/config/routes.rb b/config/routes.rb
index d664434e1a6..5ce1f49ec6a 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -710,6 +710,7 @@ Rails.application.routes.draw do
             post :toggle_subscription
             get :referenced_merge_requests
             get :related_branches
+            get :can_create_branch
           end
           collection do
             post  :bulk_update