message: apiExplorer: add spacing between dropdown components
diff: @@ -224,6 +224,7 @@ const APIResourcesList = compose(withRouter, connect<APIResourcesListPropsFromSt
  selectedKey={groupFilter}
  spacerBefore={groupSpacer}
  title={groupOptions[groupFilter]}
  + className="btn-group"
  />
  <Dropdown
  items={versionOptions}
  @@ -231,6 +232,7 @@ const APIResourcesList = compose(withRouter, connect<APIResourcesListPropsFromSt
  selectedKey={versionFilter}
  spacerBefore={versionSpacer}
  title={versionOptions[versionFilter]}
  + className="btn-group"
  />
  </div>
  <div className="co-m-pane__filter-bar-group co-m-pane__filter-bar-group--filter">
  