this re-brands refresh events as buffalo:dev events. it also fixes a data race found in context

[markbates]

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[codecov]

Codecov Report

Merging #1309 into development will increase coverage by 0.06%.
The diff coverage is 68.18%.

@@               Coverage Diff               @@
##           development    #1309      +/-   ##
===============================================
+ Coverage        53.85%   53.92%   +0.06%     
===============================================
  Files               76       76              
  Lines             3524     3540      +16     
===============================================
+ Hits              1898     1909      +11     
- Misses            1526     1530       +4     
- Partials           100      101       +1

Impacted Files	Coverage Δ
context.go	100% <100%> (ø)	⬆️
buffalo/cmd/dev.go	5.55% <16.66%> (+0.79%)	⬆️
default_context.go	68.53% <86.66%> (+2.11%)	⬆️

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