Bug#37642: gnome-apt: Expanded dependencies dont grok filter

[mblevin@debian.org]

Package: gnome-apt
Version: 0.3.2

When you expand a package in gnome-apt to show it's dependencies, then
change the filter so that this expanded package is no longer shown, its
children are still there.

To reproduce:
Select the 'alien' package and expand it to view its dependencies.
Then, change the Priority drop-down filter so that 'Extra' packages
are not shown.

-- System Information
Debian Release: potato
Kernel Version: Linux turd 2.2.4 #1 Wed Mar 24 01:30:32 EST 1999 i586 unknown

Versions of the packages gnome-apt depends on:
ii  apt             0.3.6          Advanced front-end for dpkg
ii  gdk-imlib1      1.9.4-3        Gdk-Imlib is an imaging library for use with
ii  libart2         1.0.9-2        The Gnome canvas widget
ii  libaudiofile0   0.1.6-1        The Audiofile Library
ii  libc6           2.1.1-5        GNU C Library: Shared libraries and timezone
ii  libesd0         0.2.10-0.19990 Enlightened Sound Daemon - Shared libraries
ii  libglib1.2      1.2.2-1        The GLib library of C routines
ii  libgnome32      1.0.9-2        The Gnome libraries
ii  libgnomesupport 1.0.9-2        The Gnome libraries (Support libraries)
ii  libgnomeui32    1.0.9-2        The Gnome libraries (User Interface)
ii  libgtk1.2       1.2.2-1        The GIMP Toolkit set of widgets for X
ii  libstdc++2.9-gl 2.91.66-1      The GNU stdc++ library (egcs version)
ii  libzvt2         1.0.9-2        The Gnome zvt (zterm) widget
ii  xlib6g          3.3.3.1-3      shared libraries required by X clients
ii  zlib1g          1.1.3-3        compression library - runtime
ii  apt             0.3.6          Advanced front-end for dpkg
	^^^ (Provides virtual package libapt-pkg2.4)