Changeset [91f96e1c03b885877b4a6a904adb6d95a3b39289] by Mitch Skinner

fixed issue with features getting lost if the feature didn't span a block boundary but the label did, and then the user scrolls so that the original containing block goes away and comes back, but the neighboring block, onto which the label extends, stays around.
http://github.com/jbrowse/jbrowse/commit/91f96e1c03b885877b4a6a904a...