alternative approaches or add-ons to this PR could be taken include
a) allowing user to use a refname autocomplete on the import form before submitting
b) allow user to tailor the set of chromosomes displayed in some way (similar to https://github.com/GMOD/jbrowse-components/issues/2063) which could help for very fragmented e.g. hundreds of thousands of scaffolds scenarios
the default output comparing hg19 vs hg38 looks like so after this PR
fixes https://github.com/GMOD/jbrowse-components/issues/4372
alternative approaches or add-ons to this PR could be taken include
a) allowing user to use a refname autocomplete on the import form before submitting b) allow user to tailor the set of chromosomes displayed in some way (similar to https://github.com/GMOD/jbrowse-components/issues/2063) which could help for very fragmented e.g. hundreds of thousands of scaffolds scenarios
the default output comparing hg19 vs hg38 looks like so after this PR