#87 hide object name+args with gop

[IOhannes m zmölnig]

the attached patch adds a new checkbox to the
gop-properties which allows to "hide object name and
arguments".
this makes it possible to have long objectnames which
at the same time are gop-abstractions with a small width.
(i think it is very inconvenient if the minimum width
of a gop-object is determined by the object's name and
its arguments)

this is related to feature request [ 1491020 ]

[IOhannes m zmölnig]

patch against pd-0.40cvs

[Miller Puckette]

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Took it for 0.40