Store surfaceId after finshing transaction.
Store surfaceId after finshing transaction.

michael/substance-1,abhaga/substance,michael/substance-1,andene/substance,TypesetIO/substance,podviaznikov/substance,substance/substance,substance/substance,stencila/substance,podviaznikov/substance,jacwright/substance,TypesetIO/substance,andene/substance,abhaga/substance,jacwright/substance