remove duplicated apicall
use ng-options directive
highlight the selected api call doc
refine the layout of json editor
minor change
Merge pull request #6 in UVFG/uv-fg-be-apitester from feature/fg-146-display-info to develop

* commit '7a22e9371c94fc977d1a539402c55be84ba22102':
  minor change
  refine the layout of json editor
  highlight the selected api call doc
  use ng-options directive
  remove duplicated apicall