effect list has button to add to current song

Ignore-this: 336da00ee802890c5b75af5b0d2ab255

darcs-hash:20140615154715-836b1-6488bb8f7dd8c3b64e227084e34f999fd08e32f4
start to make inputquneo able to add effects to current song

Ignore-this: d56554a7a10411346e709007006bc4dd

darcs-hash:20140615154747-836b1-98a37c586a6b81b8e53323df44db82ab19d8bf50