System setting default core namespace filtering issue

[Jako]

Bug report

Summary

The namespace combo shows and filters the first available namespace if the core namespace is on page 2 in that combo. This is normally not visible but on my dev machine I have a lot of namespaces.

Step to reproduce

Create a lot of namespaces starting with the letter a and go to the system settings. The combo shows and filters the first available namespace.

Expected behavior

It should use core, if thats available for the current user.

Related issue(s)/PR(s)

In #12562 r.find('name', this.config.preselectValue); seems to be restricted with the default limit on the combo.

Environment

MODX 2.8.3 but 3.0.0-beta use the same code.