Connect z_delta_dimensionSB to delta height

Summary:
z_delta_dimension was being saved as z_dimension this correct that so deltas can have
height saved in the profile

Reviewers: patrickelectric, laysrodrigues, tcanabrava

Reviewed By: patrickelectric, tcanabrava

Subscribers: Atelier: General Development

Tags: Atelier: General Development

Differential Revision: https://phabricator.kde.org/D17519