Label and save a list of objects
mrggsave_list(x, flatten = TRUE, ...)passed to mrggsave_common()
if TRUE, flatten if an object is a list; this
should be TRUE unless you really don't want to flatten here
passed to mrggsave_common()
No arrangement is done; the objects are just labeled and save.
The objects could be ggplot objects or ggplot
objects that have been arranged on a page
with mrggpage().