Display errors from external sources

[carlobortolan]

Show an error or success message when the success or error and error_description query parameters are set:

https://genius.embloy.com/settings?tab=integrations?error=access_denied&error_description=User%20did%20not%20authorize%20the%20request

would display something like:

An error occured: Type: access_denied, Description: User did not authorize the request

or

https://genius.embloy.com/settings?tab=integrations?success=Successfully%20connected%20to%20Lever

would display something like:

Successfully connected to Lever