Reload page to check if branch is deleted

When the "Delete merged branches" button is used the UI doesn't
update automatically. So when the page is refreshed it's possible
that the branch will still be present.

This checks for the branch to be gone and reloads if it is not,
repeating until the default timeout (60s).

qa/qa/page/project/branches/show.rb

@@ -28,9 +28,11 @@ module QA
             finished_loading?
           end
 
-          def has_no_branch?(branch_name)
-            within_element(:all_branches) do
-              has_no_element?(:branch_name, text: branch_name, wait: Support::Waiter::DEFAULT_MAX_WAIT_TIME)
+          def has_no_branch?(branch_name, reload: false)
+            wait(reload: reload) do
+              within_element(:all_branches) do
+                has_no_element?(:branch_name, text: branch_name)
+              end
             end
           end
 

qa/qa/specs/features/browser_ui/3_create/repository/add_list_delete_branches_spec.rb

@@ -84,7 +84,7 @@ module QA
 
         page.refresh
         Page::Project::Branches::Show.perform do |branches_view|
-          expect(branches_view).to have_no_branch(second_branch)
+          expect(branches_view).to have_no_branch(second_branch, reload: true)
         end
       end
     end