Fix two flaky specs that didn't wait for the MR widget to load

Signed-off-by: Rémy Coutable <remy@rymai.me>

spec/features/discussion_comments/merge_request_spec.rb

@@ -12,6 +12,9 @@ describe 'Thread Comments Merge Request', :js do
     sign_in(user)
 
     visit project_merge_request_path(project, merge_request)
+
+    # Wait for MR widget to load
+    wait_for_requests
   end
 
   it_behaves_like 'thread comments', 'merge request'

spec/features/merge_request/user_resolves_diff_notes_and_discussions_resolve_spec.rb

@@ -568,5 +568,8 @@ describe 'Merge request > User resolves diff notes and threads', :js do
   def visit_merge_request(mr = nil)
     mr ||= merge_request
     visit project_merge_request_path(mr.project, mr)
+
+    # Wait for MR widget to load
+    wait_for_requests
   end
 end