Adjust description of Enginio component in installer

The description of the Enginio component in the installer currently reads "Create ... in no time". This sounds overly optimistic from a technical point of view. Maybe something shortened like "With Enginio you can add a [scalable and] powerful Qt cloud backend as a service and deploy in minutes without bothering about backend servers or scalability problems" would serve the intended purpose as well. (Maybe also drop the [...] part, as scalability is mentioned again later in the sentence)