#4568 Sharing buttons have no option to hide/remove them

[Ihar `Philips` Filipau]

Recently added popping-up-on-mouse-hover sharing buttons (Twitter, FB, G+) have no option to hide/remove them.

As a workaround, I had to activate AdBlock and add element hiding for the class "comment_share".

P.S. Also, in FireFox 3.6, at text zoom level 1 (hit ^+ once), the appearance of buttons inside of the comment block causes it to change size, what is very annoying.