Document each choice in the Install Wizard

[jidanni]

Each choice in the Install Wizard should have link to official documentation

In the Install Wizard the user sees for example

        ( ) Import Bitcoin addresses or private keys

Please add a "[?]"

        ( ) Import Bitcoin addresses or private keys[?]

that the user can mouseover/click to find out what this is all about.

Else all the user can do is resort to Google and hope for the best.

But that might result in him finding the wrong advice, and losing all
his funds.

Therefore each step needs a mouseover or link to official documentation.