Annotation Display behavior at large width/scale

[josiahseaman]

For starters, turn off the Annotation Display at ridiculous width (maybe two full screen widths). We need to come up with a compressed view for Annotation Display where we have a bar graphs that shows how many annotations there are in each horizontal line. This overview functionality can be a new issue if you wish.

[josiahseaman]

While your commit fixes the immediate issue, I'd still like to have an open issue for an alternative way of displaying annotation pile up at a location. This is probably going to be a continuous bar graph where the score is normalized by the percent of the largest peak. So no matter if you have 10 or 10,000 annotations overlapping on line 24, that becomes 100% and you can see relative pileup everywhere else.