Splice junction track, menu size and research variant count fixes

[4.36]

Added

• Parse and save splice junction tracks from case config file
• Tooltip in observations panel, explaining that case variants with no link might be old variants, not uploaded after a case rerun

Fixed

• Warning on overwriting variants with same position was no longer shown
• Increase the height of the dropdowns to 425px
• More indices for the case table as it grows, specifically for causatives queries
• Splice junction tracks not centered over variant genes
• Total number of research variants count
• Update variants stats in case documents every time new variants are loaded
• Bug in flashing warning messages when filtering variants

Changed

• Clearer warning messages for genes and gene/gene-panels searches in variants filters