[BUGFIX] fixes #502 (backport #503)

[mergify[bot]]

This is an automatic backport of pull request #503 done by Mergify. Cherry-pick of 98f9183fbe30c28bea7db9daeaef140a9d547393 has failed:

On branch mergify/bp/8.1.x/pr-503
Your branch is up to date with 'origin/8.1.x'.

You are currently cherry-picking commit 98f9183f.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
    both added:      Classes/Controller/Backend/LinkBrowserController.php
    both modified:   Configuration/Backend/Routes.php

no changes added to commit (use "git add" and/or "git commit -a")

Cherry-pick of 21984ab90e9bacb975373bcfb13c30dbe787ad7d has failed:

On branch mergify/bp/8.1.x/pr-503
Your branch is ahead of 'origin/8.1.x' by 1 commit.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit 21984ab9.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
    both modified:   Classes/Controller/Backend/LinkBrowserController.php
    both modified:   Configuration/Backend/Routes.php

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[opi99]

@Mergifyio refresh

[mergify[bot]]

refresh

✅ Pull request refreshed

[opi99]

This backport is wrong, the original commit was already for 8.1.x branch, my fault