Removing _construct functions when fixing _new() functions.

[murrayc t-online de (Murray Cumming)]

I have 3 patches here
http://bugzilla.gnome.org/show_bug.cgi?id=77225
to make libbonoboui's various widgets' *_new() functions into mere
convenience wrappers for g_object_new(). This is achieved by adding
properties. That's what's they're supposed to be, for the sake of
language bindings and glade.

While doing this I've removed the old *_construct() functions. They were
the GTK1.2 way to solve this problem.

Officially, this breaks API, but only language bindings (not many for
libbonoboui yet) and glade (doesn't seem to affect it yet) are going to
notice, and they should stop using *_construct() anyway. It doesn't make
much difference, but when *_construct() are removed it makes it easier
to see that libbonoboui does things properly.

-- 
Murray Cumming
murrayc usa net
www.murrayc.com