installer: Resolved issue with wizard in safari
installer: Resolved issue with wizard in safari

The right column's background did not have the same height as the content in Safari. Removing height: 100% from the style solves this issue and works in Chrome and FireFox as well.

Signed-off-by: aeneasr <f7b948dad1afaad097aaa9ebb817c67370577dc9@serlo.org>

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