`cap_html_filtering` directive does not work

[AdamWr]

I'm not sure, but it looks that cap_html_filtering directive does not work - https://adguard.com/kb/general/ad-filtering/create-own-filters/#conditions-directive

cap_html_filtering — products that support HTML filtering rules: AdGuard for Windows, AdGuard for Mac, AdGuard for Android, and AdGuard for Linux

We had something like:

!#if (cap_html_filtering)
example.org$$div
!#endif

but for some reason rules inside directive was not available in filters for apps.