Provide users a clear indicator about the installation progress

Users and especially new users and evaluators cannot estimate, what it requires to install Qt. They have no indicator, in which phase the installation is or how many steps the installation requires.

Let's provide installation step information to the user. The steps could be shown as page names, where the user clearly sees the progress. 

Optionally, the user could go back to a previous installation step by clicking on the page name. 

A proposed wireframe attached.