mixxxdj/mixxx — pull request #357 by daschuer (2014-10-07 21:08:23+00:00)
Title: Kill buttons2

This adds kill buttons to all three new three band EQs.
This commit is the successor of https://github.com/mixxxdj/mixxx/pull/297 and based on it.

I know there is a pending discussion if this is the right way to support push buttons.
So this is only a base to implement the final solution for 1.12

Any hints what to improve to be mergeable?