Prettify leg view in debug client

[leonardehrenfried]

Summary

Makes the leg view in the debug client a little more visually pleasing and easier to scan.

Before

After

It also makes smaller changes to the debug client:

• Uses the new Transmodel API path
• Introduces a more visually pleasing color scheme for the modes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.45%. Comparing base (69191b5) to head (2998fdd).
Report is 4 commits behind head on dev-2.x.

❗ Current head 2998fdd differs from pull request most recent head adbaf96

Please upload reports for the commit adbaf96 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##             dev-2.x    #5918   +/-   ##
==========================================
  Coverage      69.45%   69.45%           
+ Complexity     17071    17066    -5     
==========================================
  Files           1929     1928    -1     
  Lines          73584    73580    -4     
  Branches        7550     7550           
==========================================
+ Hits           51107    51108    +1     
+ Misses         19853    19847    -6     
- Partials        2624     2625    +1     

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