DEVSU-2990 Change header text size when adding variant text to the genomic report

[bnguyen-bcgsc]

• DEVSU-2990
• Make variant text header font size consistent
• Add space break after comma of each cancer type in variant text header

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.04%. Comparing base (b72ef41) to head (c47359c).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #120   +/-   ##
========================================
  Coverage    84.04%   84.04%           
========================================
  Files           18       18           
  Lines         2613     2613           
========================================
  Hits          2196     2196           
  Misses         417      417           

Flag	Coverage Δ
unittests	84.04% <100.00%> (ø)

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