Fix saving labels in Chargeback assigments
Fix saving labels in Chargeback assigments

Fix saving labels for mutliple label categories
add new array @edit[:cb_assign][:docker_label_values_saved]
to keep selected categories.

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic