[packagekit] don't allow partial updates

[Richard Hughes]

On 29 March 2011 16:14, Richard Hughes <hughsient at gmail.com> wrote:
> I'll do the same in GPK now.

commit 3430b3a28486becc75a899c5527b3df20d602fcf
Author: Richard Hughes <richard at hughsie.com>
Date:   Tue Mar 29 16:26:40 2011 +0100

    Do not set the package checkboxes to be selectable if the backend
is not able to do UpdatePackages

Richard