feat(files): add "search everywhere" button within the filters row

[susnux]

Summary

Add a button to make the current filtering a global search.
As discussed with @kra-mo and @marcoambrosini

Screenshot

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[skjnldsv]

In the future, it will just be a redirect to https://dev.domain.com/apps/files/home?query=xxxxxxxx, do you still think it's worth merging this ?

[susnux]

In the future, it will just be a redirect to https://dev.domain.com/apps/files/home?query=xxxxxxxx, do you still think it's worth merging this ?

Yes then only the action needs to be adjusted but everything else can stay as it is, even tests should still work then.