SystemUpdate: optionally update automatically

[danirabbit]

Fixes #52

[leolost2605]

Also just wondering whether we should go the GNOME route and have a tick box with "Install pending software updates" in the shutdown dialog? This would allow for an update and shutdown behavior without user interaction which on windows is quite useful to me... on the other hand it might lead to users just never installing updates..? Although I think that's unlikely?

[danirabbit]

@leolost2605 sorry I'm not sure I understand. Are you saying have a checkbox to opt out of installing pending updates?

[leolost2605]

@danirabbit yup:

(sry for the quality, was the best screenshot i could find, i currently don't have a gnome install lying around)

Also here if you click shutdown it will first restart into updating and then shutdown without user interaction.

On windows the shutdown menu after an update has the options restart, restart and update, shutdown, shutdown and update

I'm not quite sure we really need this since updates here take not that long and shutdown always works (it doesn't first update and then shutdown). But for example if I just need to quickly restart and don't want to update anything this might be useful. Or if I go to bed for example I can shutdown and it will automatically install the updates before actually shutting down so in the morning when i fire up my pc it's ready to go and doesn't boot right into the update process.

[danirabbit]

@leolost2605 those sound like quite a bit more complicated behaviors than what I was going for here. Could we look at additional features in follow-up branches?

[leolost2605]

LGTM

[leolost2605]

@leolost2605 those sound like quite a bit more complicated behaviors than what I was going for here. Could we look at additional features in follow-up branches?

@danirabbit yeah of course I was just abusing this PR to get design feedback for that :)
Also this would have to be implemented in the session wingpanel indicatior I think (where the end session dialog is)