Change preview for markdown-it in order to have all md support

[soupette]

Signed-off-by: soupette cyril.lpz@gmail.com

Description of what you did:

Small update in order to change the markdown parser in order to improve the preview.
The preview is now very similar to this demo

[codecov]

Codecov Report

Merging #7041 into features/rbac will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@                Coverage Diff                @@
##           features/rbac    #7041      +/-   ##
=================================================
- Coverage          25.68%   25.67%   -0.02%     
=================================================
  Files               1131     1131              
  Lines              15392    15399       +7     
  Branches            2428     2431       +3     
=================================================
  Hits                3953     3953              
- Misses              9605     9609       +4     
- Partials            1834     1837       +3     

Flag	Coverage Δ
#front	18.26% <0.00%> (-0.02%)	⬇️
#unit	50.90% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ger/admin/src/components/PreviewWysiwyg/Wrapper.js	0.00% <0.00%> (ø)
...nager/admin/src/components/PreviewWysiwyg/index.js	0.00% <0.00%> (ø)
.../src/components/PreviewWysiwyg/utils/mdRenderer.js	0.00% <0.00%> (ø)
...rc/containers/EditViewDataManagerProvider/index.js	0.00% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update dd023c3...138f3bd. Read the comment docs.

[alexandrebodin]

Works like a charm