update-manager tries to write unnecessary file on kde

[Erich Eickmeyer]

Ubuntu Studio is currently making an attempt to switch from Plasma Discover handling all updates to using Update Manager to handle updates instead, keeping with the Ubuntu way of updating as opposed to the Packagekit frontend which misses a lot of items and tends to ignore items intended for phased updates.

Right now, Update Manager, when run, while running updates, shows the attached dialog, sometimes repeatedly. This is bad UX and needs to be resolved before we can ship this.

'Configuration file "//.config.debconf-kde-helperrc" not writable. Please contact your system administrator.'