Tweaks for range labels

[Primigenus]

Aligns the font size with the knob label and ensures the range label doesn't wrap.

How to test

Add addon-knobs and a number range knob and observe result.

[codecov]

Codecov Report

Merging #3340 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master    #3340   +/-   ##
=======================================
  Coverage   35.63%   35.63%           
=======================================
  Files         472      472           
  Lines       10122    10122           
  Branches      945      970   +25     
=======================================
  Hits         3607     3607           
+ Misses       5925     5900   -25     
- Partials      590      615   +25

Impacted Files	Coverage Δ
addons/knobs/src/components/types/Number.js	7.46% <0%> (ø)	⬆️
app/vue/src/server/utils.js	0% <0%> (-100%)	⬇️
addons/viewport/src/preview/components/Viewport.js	95.74% <0%> (ø)	⬆️
lib/ui/src/modules/ui/components/layout/index.js	27.15% <0%> (ø)	⬆️
addons/knobs/src/mithril/WrapStory.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/containers/shortcuts_help.js	25% <0%> (ø)	⬆️
...es__/update-addon-info/update-addon-info.output.js	0% <0%> (ø)	⬆️
addons/jest/src/components/Result.js	0% <0%> (ø)	⬆️
...ns/viewport/src/manager/components/viewportInfo.js	33.33% <0%> (ø)	⬆️
addons/actions/src/lib/types/infinity/index.js	80% <0%> (ø)	⬆️
... and 63 more

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