improve(migration): use full available height for diagrams
improve(migration): use full available height for diagrams

Related to CAM-5838

TitanUser/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp