[Filtering log] $replace rule is shown as applied to images

[Alex-302]

http://ipic.su/img/img7/fs/kiss_269kb.1479740572.png

[Alex-302]

Also replace rule looks like is not applied to HTML
http://ipic.su/img/img7/fs/kiss_43kb.1479744127.png

Related forum thread
https://forum.adguard.com/index.php?threads/%D0%9F%D1%80%D0%B8%D0%BC%D0%B5%D0%BD%D0%B5%D0%BD%D0%B8%D0%B5-replace-%D0%BA-html.16269/#post-113729

[ameshkov]

@confessor-adguard the thing is that $replace rule is stored in the FilteringContext for all requests.
We do not mark requests for which it was actually applied.

So there're two ways of fixing the issue:

1. Add a "IsReplaceRuleApplied" flag
2. Clean "FiredReplaceRule" in case if it was not applied.

[ameshkov]

We may need to create similar issue in Mac repo as well.