Bugfixes, improvements to layout and performance

[4.39]

Added

• COSMIC IDs collected from CSQ field named COSMIC

Fixed

• Link to other causative variants on variant page
• Allow multiple COSMIC links for a cancer variant
• Fixed MitoMap and HmtVar links for hg38 cases
• Do not open new browser tabs when downloading files
• Selectable IGV tracks on variant page
• Missing splice junctions button on variant page
• Refactor variantS representative gene selection, and use it also for cancer variant summary

Changed

• Improve Javascript performance for displaying Chromograph images
• Make ClinVar classification more evident in cancer variant page