[Bug 31979] Screensaver should allow "selective random"

[Kristoffer Lundén]

Public bug reported:
https://launchpad.net/malone/bugs/31979

Affects: gnome-screensaver (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
I would like it to be possible to be selective about which screensavers
gets to be in the random list. I have a few favourites but currently it
is all or nothing.

A simplistic way to implement this would be to simply allow CTRL-
selecting in the screensavers list, see attached screenshot for mock-up.
It's not totally discoverable but OTOH it was the first thing I tried...
and it could be mentioned in the help for those who look for it. Those
who don't look for it will never notice.

A further step would be to have a separate GUI for this, but I'm note
sure if it's needed. An even better way to do it would be to introduce
checkboxes, that way individual screensavers could be previewed while
retaining the list.