making config tools use system icons

[Bill Nottingham]

Most of the python config tools (system-config-*, anaconda) include
their own copies of bluecurve icons. It makes sense to me that they
should use system icons whenever possible, to match the current theme.

See https://bugzilla.redhat.com/show_bug.cgi?id=291261 for an example
patch for one of the tools.

Do other people think this is worth fixing across the board?

Bill