#91 "hide object name" toggle broken for data structures

[Frank Barknecht]

The "hide object name and arguments" toggle for
subpatches does not survive saving the patch, if a data
structure scalar is displayed inside the respective
subpatch. Attached patch illustrates this behaviour: To
reproduce it, toggle the "hide"-toggle to on for the
[pd draw] and [pd $0-draw] subpatches, then save and
reopen the file. The object name will show up again.

[Frank Barknecht]

patch illustrating the bug.