Fix course list scroller.
Fix course list scroller.

max-height='' is not enough to override the stylesheet's default.  Needs max-height='none'

	Change on 2016/08/25 by nretallack <nretallack@google.com>

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=131313621

andela-angene/coursebuilder-core,andela-angene/coursebuilder-core,andela-angene/coursebuilder-core,andela-angene/coursebuilder-core