Giphy: adapt to guidelines/improve user experience

[da-ba]

• Consider implementing the GIPHY Search Endpoint https://developers.giphy.com/docs/api/endpoint#search
  Already in place

• Consider implementing GIPHY Analytics by calling Action Register Endpoint https://developers.giphy.com/docs/api/endpoint#action-register
  Out of scope for now

• apply for a non-rate limited production key in the dev portal dashboard https://developers.giphy.com/dashboard/