Final solution:

1. Filters used when we create/edit a Catalog should be divided into groups and sorted by A-Z in each group.

• For filters based on attributes use Attribute group names
• For filters: Product availability, Product created (Product category, Product type, Product price  *if removed by the user from the workspace) use a separate group with the name: Standard filters
• For filters added as extensions by partners, we can use a separate group: Custom filters 

https://projects.invisionapp.com/d/main?origin=v7#/console/22029324/468631702/comments 

Please unify the names of filters: only the first word starts with a big letter.

It should be possible to search for the selected filter.