Fix a bug that does not highlight discussions

[LeZVince]

Hello,

The discussion highlighter seems to be broken (not working anymore) since V 7.12.0.
I use it as a mark as read function on the Discussion section.

When I click the star on the discussion, the star is filled the discussion is not green highlighted, but when I refresh the page the star is no more filled and the discussion is not highlighted as green.

Thanks per advance for fixing it :)

PS : Your script is great, I use it all the time :)