Improve keys formatting in "About this track"
Improve keys formatting in "About this track"

- use this.config.metadata if we can, trackMetaDataStore mangles the keys
- if trackSelector.renameFacets was defined, use the formatted keys provided
- instead of blanket ucFirst: only apply if all lowercase, and also swap underscores for spaces to show camel case nicer
- sort keys alphabetically (instead of current random order)

GMOD/jbrowse,GMOD/jbrowse,GMOD/jbrowse,GMOD/jbrowse,GMOD/jbrowse