fix(Dashboard): Make color scheme optional

[geido]

SUMMARY

It makes the color scheme optional when saving a Dashboard and adds a test case

BEFORE

Test.mp4

AFTER

untitled.dashb.3.mp4

TESTING INSTRUCTIONS

1. Create a new Dashboard
2. Leave the color scheme empty
3. Make sure you can save

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[michael-s-molina]

LGTM

[codecov]

Codecov Report

Merging #17357 (db86dd4) into master (fa51b32) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #17357      +/-   ##
==========================================
- Coverage   77.14%   77.13%   -0.01%     
==========================================
  Files        1036     1036              
  Lines       55757    55757              
  Branches     7628     7628              
==========================================
- Hits        43011    43010       -1     
- Misses      12490    12491       +1     
  Partials      256      256              

Flag	Coverage Δ
javascript	71.41% <100.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...src/dashboard/components/PropertiesModal/index.jsx	83.21% <100.00%> (ø)
...eFilters/FiltersConfigModal/FiltersConfigModal.tsx	87.13% <0.00%> (-0.59%)	⬇️

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[sadpandajoe]

🏷️ 2021.44