ERROR namespace_project_design_management_design_url

Steps to reproduce

1. create issue
2. add designs
3. comment design
4. delete design
5. back to dashboard

Demo

• error dashboard https://gitlab.com/d.weizhe1
• issue https://gitlab.com/d.weizhe1/test-design/-/issues/1

Error log

{
  "method": "GET",
  "path": "/dashboard/activity",
  "format": "json",
  "controller": "DashboardController",
  "action": "activity",
  "status": 500,
  "duration": 1585.71,
  "view": 0,
  "db": 89.87,
  "time": "2020-03-23T01:35:43.130Z",
  "params": [
    {
      "key": "limit",
      "value": "20"
    },
    {
      "key": "offset",
      "value": "0"
    }
  ],
  "remote_ip": "192.168.0.202",
  "user_id": 1,
  "username": "dweizhe",
  "ua": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36",
  "queue_duration": null,
  "correlation_id": "OX3TBjatwu7",
  "cpu_s": 1.472583929999999,
  "exception.class": "ActionView::Template::Error",
  "exception.message": "undefined method `namespace_project_design_management_design_url' for #<#<Class:0x00007fde2ddf72e0>:0x00007fde2a7e9c20>\nDid you mean?  namespace_project_design_management_designs_raw_image_url",
  "exception.backtrace": [
    "app/helpers/events_helper.rb:169:in `event_note_target_url'",
    "ee/app/helpers/ee/events_helper.rb:12:in `event_note_target_url'",
    "app/helpers/events_helper.rb:179:in `block in event_note_title_html'",
    "app/helpers/events_helper.rb:177:in `event_note_title_html'",
    "app/views/events/event/_note.html.haml:9",
    "app/views/events/_event.html.haml:13",
    "app/views/events/_events.html.haml:10",
    "app/controllers/application_controller.rb:328:in `pager_json'",
    "app/controllers/dashboard_controller.rb:22:in `block (2 levels) in activity'",
    "app/controllers/dashboard_controller.rb:17:in `activity'",
    "ee/lib/gitlab/ip_address_state.rb:10:in `with'",
    "ee/app/controllers/ee/application_controller.rb:43:in `set_current_ip_address'",
    "app/controllers/application_controller.rb:479:in `set_current_admin'",
    "lib/gitlab/session.rb:11:in `with_session'",
    "app/controllers/application_controller.rb:470:in `set_session_storage'",
    "app/controllers/application_controller.rb:464:in `set_locale'",
    "lib/gitlab/error_tracking.rb:34:in `with_context'",
    "app/controllers/application_controller.rb:555:in `sentry_context'",
    "lib/gitlab/application_context.rb:46:in `block in use'",
    "lib/gitlab/application_context.rb:46:in `use'",
    "lib/gitlab/application_context.rb:19:in `with_context'",
    "app/controllers/application_controller.rb:455:in `set_current_context'",
    "ee/lib/gitlab/jira/middleware.rb:19:in `call'"
  ]
}