Changed active button fill color to match mattermost theme

[dbejanishvili]

[codecov[bot]]

Codecov Report

Merging #59 into master will decrease coverage by 0.08%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #59      +/-   ##
==========================================
- Coverage   50.42%   50.33%   -0.09%     
==========================================
  Files          24       24              
  Lines         593      594       +1     
  Branches        1        1              
==========================================
  Hits          299      299              
- Misses        294      295       +1     

Flag	Coverage Δ
#backend	60.00% <ø> (ø)
#frontend	41.11% <0.00%> (-0.14%)	:arrow_down:

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Impacted Files	Coverage Δ
webapp/src/components/iconPresenter.jsx	0.00% <0.00%> (ø)
webapp/src/constants/SVGs.js	0.00% <0.00%> (ø)
webapp/src/index.js	0.00% <ø> (ø)

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