Feature : Hide legend in view_ranges() when a single xcat is being shown

[Magnus167]

Closes #752

[codecov]

Codecov Report

Patch coverage: 13.04% and project coverage change: -0.16 ⚠️

Comparison is base (502e1c7) 73.66% compared to head (c856c4b) 73.51%.

❗ Current head c856c4b differs from pull request most recent head a17053d. Consider uploading reports for the commit a17053d to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #835      +/-   ##
===========================================
- Coverage    73.66%   73.51%   -0.16%     
===========================================
  Files           31       31              
  Lines         3684     3693       +9     
===========================================
+ Hits          2714     2715       +1     
- Misses         970      978       +8     

Impacted Files	Coverage Δ
macrosynergy/panel/view_ranges.py	12.50% <13.04%> (-0.20%)	⬇️

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