fix profile image on dashboard

[calebdoxsey]

Summary

GetClaim returns a list instead of a single value. This fixes the dashboard so that it uses range instead of with as well as passing it through safeURL.

Related issues

• Fixes authenticate: dashboard returns malformed user gravatar #1604

Checklist:

• add related issues
• updated docs
• updated unit tests
• updated UPGRADING.md
• ready for review

[codeclimate]

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[codecov]

Codecov Report

Merging #1637 (f6f75f0) into master (3f7777f) will decrease coverage by 0.0%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master   #1637     +/-   ##
========================================
- Coverage    55.5%   55.5%   -0.1%     
========================================
  Files         126     126             
  Lines        9156    9156             
========================================
- Hits         5086    5085      -1     
- Misses       3577    3580      +3     
+ Partials      493     491      -2     

Impacted Files	Coverage Δ
pkg/storage/redis/redis.go	70.3% <0.0%> (-1.4%)	⬇️
internal/autocert/manager.go	64.4% <0.0%> (+1.4%)	⬆️