Set readOnly to 'nocursor' in markdown editor

[isaachilly]

Using 'nocursor' when readOnly is true, ensures the blinking caret is hidden.

For example, on log entries, focussing on the log text will make a blinking caret appear, I believe this is too similar behaviour to that of editing/creating an entry and is disconcerting.

I DON'T have JIRA ticket

• explain what this PR does
• if it is a new feature, explain how you plan to use it
• tests are added
• documentation was updated or added

Notable changes for users:

• N/A

Notable changes for developers:

• N/A

Changes made to the database:

• N/A

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 45.61%. Comparing base (bff8c8f) to head (39bf8d4).

Files with missing lines	Patch %	Lines
lib/public/components/common/markdown/markdown.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2041      +/-   ##
==========================================
+ Coverage   45.47%   45.61%   +0.14%     
==========================================
  Files        1023     1023              
  Lines       17053    17054       +1     
  Branches     3092     3093       +1     
==========================================
+ Hits         7754     7780      +26     
+ Misses       9299     9274      -25     

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[graduta]

Hi @isaachilly . The idea is good but by not allowing the cursor, the copy-paint functionality will not work anymore on Firefox and Chrome.
It does work on Safari, but we have to support all 3 browsers. If not easy solution is found, I would propose for the PR to be closed without merging