Show fewer labels for GWAS catalog view #264
Description
As the GWAS catalog gets more dense, in some regions the association plot labels (for claimed catalog traits) are unusably dense. We should evaluate ways to reduce how many labels are shown. (eg show unique labels, not all duplicates) This may involve some syntax / implementation adjustments.
The current label layout code also triggers many forced repaints. Can we speed this up by rewriting the placement algorithm?