Fix Wavedrom in Jupyter Notebook

[ryoon]

• Use HTML tags instead of jQuery.
  Tested with Jupyter Notebook 7.5.4.

There may be better solution, anyway please fix the error without jQuery.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 92.0%. Comparing base (d116f66) to head (5e01e97).
⚠️ Report is 1 commits behind head on development.

Files with missing lines	Patch %	Lines
pyrtl/simulation.py	0.0%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##           development    #484     +/-   ##
=============================================
+ Coverage         91.9%   92.0%   +0.1%     
=============================================
  Files               30      30             
  Lines             7443    7439      -4     
=============================================
  Hits              6837    6837             
+ Misses             606     602      -4     

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[fdxmw]

Thank you for fixing this! I tested this out and it works on my computer. I also added a small change that seems to fix a longstanding issue where traces don't render the first time a render_trace() cell executes.

Please let me know if the additional change looks good to you, and then I'll merge this pull request.

Edits: I updated the fix so it periodically checks if WaveDrom is loaded before calling ProcessAll(). I now see traces immediately when I load a Jupyter notebook and select Run > Run All Cells. Also, I'd like you to take a look at this change, if you have time, because I don't know anything about JavaScript :)