Enhance settings icon in the Filtering log, when filtering criteria are set

[adbuker]

Issue Details

The first iteration of this issue was resolved in #4406, but we definitely should enhance the icon in order to follow the common AdGuard UI style

Proposed solution

No response

Alternative solution

No response

[gork7777]

@Danila-Arg I think there are still green pixels in the lower right corner of the red dot.