User search does not work if locale param is part of the URL

[arusa]

Describe the bug

When you try to search for users in the "Scoped Admins" feature, you can't find any users if the end of the URL contains something like ?locale=en.

Example: https://your.decidim.host/admin/decidim_awesome/config/admins?locale=en

In the dev tools you will see requests to this URL that contains 2 "?":

https://decidim-audit-org.participation.works/admin/decidim_awesome/users?locale=en?term=pentester%2Bdecidimawesomescopedadmin%40pentest.ait.ac.at

To Reproduce

See above

Expected behavior

To return users matching the query.

Desktop (please complete the following information):

• OS: MacOS
• Latest Safari and Firefox

Additional context

I tried it with the develop branch commit 7b356fe