util.FilterText
Description
Filters given text using Steam's filtering system. The function will obey local client's Steam settings for chat filtering:
In some cases, especially in a chatbox, messages from some players may return an empty string if the context argument used for filtering is
TEXT_FILTER_CHAT
and if the local player has blocked the sender of the message on Steam.
Arguments
3 Player player = nil
Used to determine if the text should be filtered according to local user's Steam chat filtering settings.