(no bug) - Revert clamping mixin height/max-height (#4728)
(no bug) - Revert clamping mixin height/max-height (#4728)


rlr/activity-streams,rlr/activity-streams,Mardak/activity-stream,Mardak/activity-stream,mozilla/activity-stream,mozilla/activity-stream,rlr/activity-streams,mozilla/activity-stream,mozilla/activity-streams,rlr/activity-streams,Mardak/activity-stream,Mardak/activity-stream,mozilla/activity-streams,mozilla/activity-stream