Add exon count to long reads zmenu (#741)
Add exon count to long reads zmenu (#741)

* ENSWEB-5331: add exon count to long reads zmenu

* remove unused click variable

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode