is-loading class is always attached to the filters

[kmanijak]

Steps to reproduce:

1. Go to Editor
2. Add "Filters" pattern
3. Save
4. Go to the frontend
5. Check HTML structure

Actual:
There's is-loading class attached to the filters (check the screenshot)

Expected:
There's no is-loading class attached to the filters

Screenshot

Investigation:
The class is added in the save method in index.tsx files of the filters, e.g:

• Filter by Attribute
• Filter by Rating

You can find it in filters patterns as well, so the rendered markup reflects the saved one.

This class is supposed to be removed by renderBlock function, however the container that comes in to this function is a filter wrapper, not the node to which the is-loading class is assigned in the first place, hence it stays in there.

Notes

• while removing the class, keep in mind it doesn't invalidate the block that were added before the change
• while moving the is-loading class to the wrapper it influences the editor as well (class is not removed there)
• after fixing this, these two classes that narrow down showing the Rating placeholder can be removed