Next/Previous in ticket page not visible if DCQ is enabled

[OneWorld123]

Projects where DCQ is activated as a module, won't show the Next/Previous buttons in the single ticket page.

That's a pitty since I need that feature to go through the recent tickets in our monthly team meeting.

[kty0mka]

Same for me.

Steps to reproduce:

1. Adjust query
2. Open any issue
3. You should see buttons "Previous" / "Next" & amount of issues in query, but all this disappears, when Default Custom Query plugin is activated for project.

I performed tests with latest Redmine 4.1.1 and Default Custom Query the only plugin installed, but the same behavior when using Redmine 4.0.7.

Environment:
  Redmine version                4.1.1.stable
  Ruby version                   2.6.6-p146 (2020-03-31) [x86_64-linux]
  Rails version                  5.2.4.2
  Environment                    production
  Database adapter               Mysql2
  Mailer queue                   ActiveJob::QueueAdapters::AsyncAdapter
  Mailer delivery                smtp
SCM:
  Subversion                     1.10.4
  Mercurial                      4.8.2
  Bazaar                         2.8.0
  Git                            2.20.1
  Filesystem                     
Redmine plugins:
  redmine_default_custom_query   1.5.0