Correct chart width on reload

Fixes #635

Signed-off-by: Ryan O'Hara <oharar@email.chop.edu>
The chart is never created with a `parentView`. I put a breakpoint on this line and in both cases(normal size chart and shrunken chart) there is no `parentView` defined in `options`. I'm taking a closer look at this now. I'll post here with what I find.