FeatureRequest: TextBox instead of Chromosome PullDown

We are trying to use JBrowse for our genome sequencing project. We have 5100 scaffolds. This is unwieldy for the jbrowse chromosome pull-down box (chromList). Any chance there could be an option for a text-box. We are working on trying to make the hack ourself, but we are clumsy javascripters and are far better at annotating genomes. Any help would be greatly appreciated. Thank You!