Always preload the metadata for any MR page

app/views/projects/merge_requests/show.html.haml

@@ -13,6 +13,8 @@
 - add_page_specific_style 'page_bundles/reports'
 - add_page_specific_style 'page_bundles/ci_status'
 
+- add_page_startup_api_call @endpoint_metadata_url
+
 .merge-request{ data: { mr_action: mr_action, url: merge_request_path(@merge_request, format: :json), project_path: project_path(@merge_request.project), lock_version: @merge_request.lock_version } }
   = render "projects/merge_requests/mr_title"
 
@@ -76,8 +78,6 @@
       = render "projects/merge_requests/tabs/pane", name: "pipelines", id: "pipelines", class: "pipelines" do
         - if number_of_pipelines.nonzero?
           = render 'projects/commit/pipelines_list', disable_initialization: true, endpoint: pipelines_project_merge_request_path(@project, @merge_request)
-      - if mr_action === "diffs"
-        - add_page_startup_api_call @endpoint_metadata_url
       - params = request.query_parameters
       - if Feature.enabled?(:default_merge_ref_for_diffs, @project, default_enabled: :yaml)
         - params = params.merge(diff_head: true)