Unit listing - missing condition variables fix

What was the issue? 

The unit listing didn’t receive conditional parameters that we set, meaning that filtering units would cause an error.

How did you solve it? 

Conditional variables were set to unit listing.

Why is this fix important?

It’s important because now unit listing work like they were supposed to work and units can be filtered.

How does it feel to contribute to a platform such as Pimcore? 

Contributing to Pimcore feels awesome because my code will now be an official part of Pimcore! Also, these contributions will make life easier for me and other developers that are using Pimcore.

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