[explore] forcing .1% number format when using 'Period Ratio'

[mistercrunch]

[codecov-io]

Codecov Report

Merging #4774 into master will decrease coverage by 0.02%.
The diff coverage is 16.66%.

@@            Coverage Diff             @@
##           master    #4774      +/-   ##
==========================================
- Coverage   72.59%   72.57%   -0.03%     
==========================================
  Files         205      205              
  Lines       15401    15407       +6     
  Branches     1183     1189       +6     
==========================================
+ Hits        11180    11181       +1     
- Misses       4218     4223       +5     
  Partials        3        3

Impacted Files	Coverage Δ
...ipts/explore/components/controls/SelectControl.jsx	84.74% <ø> (ø)	⬆️
...set/assets/javascripts/explore/stores/controls.jsx	38.12% <0%> (-1.13%)	⬇️
...s/javascripts/explore/components/ControlHeader.jsx	73.52% <50%> (-1.48%)	⬇️

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[betodealmeida]

@mistercrunch, can you give more context here? Is there no reason to have a different format when using "Period Ratio"?

[mistercrunch]

Oh the idea is that when using a period ratio, we're looking at a % change, so we should change the format should reflect that. Since we know it's a percentage we can just format it on their behalf.

There's no precedent into cascading control changes based on rules, here we just force the format to be .1%.

[betodealmeida]

Cool, sounds and looks good!