Light background on dark text for subjects

[ewen-lbh]

Will resolve #84.

[codecov]

Codecov Report

Merging #85 into master will increase coverage by 0.49%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           master     #85      +/-   ##
=========================================
+ Coverage    4.28%   4.78%   +0.49%     
=========================================
  Files          60      60              
  Lines        2169    2175       +6     
  Branches      605     605              
=========================================
+ Hits           93     104      +11     
+ Misses       1720    1715       -5     
  Partials      356     356              

Impacted Files	Coverage Δ
components/TheFooter.vue	0.00% <0.00%> (ø)
store/index.js	5.06% <0.00%> (-0.15%)	⬇️
components/CardSubject.vue	84.61% <0.00%> (+84.61%)	⬆️

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[ewen-lbh]

I'm going to redesign all modals in the future, but for now this should be an opt-in prop on <BadgeSubject>. Right now, the only place where subject badges (not dots) are visible is on the note editor, which is broken anyway.

On the current subject picker modal it looks horrendous