Custom label should be used in estate search

[jmaas-onoffice]

In https://github.com/onOffice-Web-Org/oo-wp-plugin/pull/405 we added custom labels for estate lists.

However, when you make a field filterable and give it a custom label, that new label only shows up in the list, not in the search form.

The custom label should be applied everywhere, including in the search form.

[dai-eastgate]

@jmaas-onoffice I fixed this bug, you can watch video and give me feedback

https://user-images.githubusercontent.com/106214469/212619491-d9279689-84f0-4564-9ed4-c1601c0af1dd.mp4

[jmaas-onoffice]

Looks good, thank you! :)