fix(qov-1607) Fix monaco editors font-size issue

[mzottola]

Summary

Issue:
The font-size was set using css, i.e font-size: 0.65rem.
It led to wrong highlight / selectable text on Chrome as it bypasses internal Monaco properties.

The current fix:

• removes the font-size from scss sources
• defines fontSize in Monaco editor property
• defines lineHeight to fit with current line height property

Screeshots diff

• Before (on chrome)

• After (on chrome)

[RemiBonnet]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.99%. Comparing base (af019ef) to head (fb28d0c).
⚠️ Report is 1 commits behind head on staging.

Additional details and impacted files

@@             Coverage Diff             @@
##           staging    #2414      +/-   ##
===========================================
- Coverage    48.33%   46.99%   -1.34%     
===========================================
  Files          955     1223     +268     
  Lines        19801    22731    +2930     
  Branches      5922     6748     +826     
===========================================
+ Hits          9571    10683    +1112     
- Misses        8409    10019    +1610     
- Partials      1821     2029     +208     

Flag	Coverage Δ
unittests	46.99% <ø> (-1.34%)	⬇️

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