For reference, this was also mentioned in another thread:
https://groups.google.com/d/msg/firebug/8YuQJoPtxPk/siDpkuFYazsJThough in a later post there it seemed like the user does see a hover and active effect but would just like to have them look like the filter buttons.
k-George, can you please make two screenshots of the button when you hover it and have it activated?
Sebastian