there is any, and copy that state to sessions created
from those templates. Should fix#4525. Breaks
existing session templates, sorry; they can be fixed by
moving the .template file into a new directory with the
name of the template (minus the .template).
git-svn-id: svn://localhost/ardour2/branches/3.0@10982 d708f5d6-7413-0410-9779-e7cbd77b26cf