Classification store: Groups and keys sorting by groupId and keyId not working properly

What was the issue? 

Inside the Classification Store tab on overview of all the groups inside a collection and all the keys inside the group, sorting by groupId and KeyId is not working properly after you add groups/keys and refresh the page.

How did you solve it? 

Adjustments to sorting queries were done so sorting would be more intuitive.

Why is this fix important?

This improves the Pimcore classification store's UI/UX.

In your opinion, what is the greatest advantage of Pimcore in comparison to other platforms you've worked on?

The sheer number of features it offers as well as an awesome administration make Pimcore one of the best and easiest platforms to work on.

And if you want to check out this pull request, just follow the link!