Azuredatastudio: Notebook: H2 with <mark> tag seems to overlap in preview / WYSIWYG

[MsSQLGirl]

• Azure Data Studio Version:
  Version: 1.23.0 (user setup)
  Commit: d296b6397e0acfddc57e9085e736e084969cdaeb
  Date: 2020-10-13T23:03:09.799Z
  VS Code: 1.49.0
  Electron: 9.2.1
  Chrome: 83.0.4103.122
  Node.js: 12.14.1
  V8: 8.3.110.13-electron.0
  OS: Windows_NT x64 10.0.19042

Steps to Reproduce:

1. Create a new notebook and type the following:
   ## <mark>No marvel then, though I mistake my view; The sun itself sees not, till heaven clears.</mark>

This seems to be an issue with H2 but not H1, H3 or H4.
Expected outcome: no overlapping.

[MsSQLGirl]

@halerankin FYI

[chlafreniere]

Almost certainly a CSS bug for H2. Should ensure that H1/H3 don't have the same problems.

[halerankin]

we'll just need to increase default line height for H2