Stop autoscroll in PRV while editing

Hey all,
   In the track view, there is an option "Left Click locks scroll", which prevents it from auto-scrolling any time a clip is selected. This is superbly handy for clips, but it would be even handier for the PRV.
 
   I do a lot with MIDI, the final stages of which requires fine-tuning a lot of velocities and controllers in the context of the mix. This is easiest to do by listening through and and tweaking each note/controller immediately after it's been heard. And it can go pretty quick if I can just keep playing without having to stop for every adjustment. But if I'm in the middle of a tweak and auto-scroll jumps to the next section, the enabled tool is still drawing...so I'm either adjusting a velocity that's now off-screen or cutting a huge swath of controller data with my pencil or eraser tool.
 
   I'd like the option to lock the PRV auto-scroll while editing.
 
Thanks,
Mike