Bug #1021857 : Added a tooltip for Auto Recall Cue

Hey, I am a newbie, and i thought this (Bug #1021857) would be a great one to start with.
I am unable to compile mixxx as for now, for various reasons, and i am sorry for that, and hence i did not make any changes in tooltips.cpp  as of now, but i hope this fixes the issue. If not, please let me know on what else is to be done.
Did you double check this? I have not recently read, the cue code, but I think the track seeks to "the CUE point". 
Mixxx always set the cue point at 0:00:00 if loaded the first time. This is independence from this option. 
Setting the CUE where the sound begins aka. the fist note-able beat, would be very desirable, but we do not have it jet. This is covered by Bug #1114505