follow-ups to new first run wizard

[szaimen]

Follow-ups to #960

• add animations: slides should move in Add transitions #991
• allow customers to adjust links to their custom clients again add initialstate provider #1004

cc @marcoambrosini

[szaimen]

@marcoambrosini only the second item is missing now from my pov

[szaimen]

@marcoambrosini the responsive layout is currently broken because we changed the button position. The button on the bottom is not always shown depending on the height...