fix(ui): prevent duplicate query params in refresh URL

[JosephKav]

Was appending the ? for query params twice
e.g. /api/v1/refresh?service_id=ID?overrides=Y

Now /api/v1/refresh?service_id=ID&overrides=Y

(From the change from path params to query params in #769)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.01%. Comparing base (d57c0ea) to head (99ad0af).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #771   +/-   ##
=======================================
  Coverage   99.01%   99.01%           
=======================================
  Files         136      136           
  Lines        9105     9105           
=======================================
  Hits         9014     9014           
  Misses         69       69           
  Partials       22       22           

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