In a specific cases, current user doesn't have to be returned from
accountsservice, or can be skipped by act_user_is_system_account check.
System users should not be shown. This is expected for root account,
but should not happen with regular user accounts. It needs to be fixed
in accountsservice if you see this happening with regular user accounts.
We have to be just sure that Users panel doesn't crash in such cases
and show all non-system user accounts returned from accountsservice.
Empty page is shown currently only if act_user_manager_list_users
returns nothing, but it has to be also shown if only system accounts
are returned. To fix this issue, do not try to show current user, but
show first user account in carousel instead if there is any. First user
account is current user in normal case.
The patch also fixes problems that current user account is sometimes
selected instead of currently selected user account. This is because
of preselection of first item in um_carousel_add, which causes unwanted
signal emissions...
https://bugzilla.gnome.org/show_bug.cgi?id=773673
UmCarouselItem is a button, but since we have now the arrow which
points to the selected item, we don't need any other visual
feedback (such as hover border/background).
https://bugzilla.gnome.org/show_bug.cgi?id=767065
UmCarousel is an horizontal container that contains UmCarouselItem
children. These items are paginated 3 at 3 at the time.
UmCarousel intents to act as controller for content containers. It
emitis the "item-activated" signal whenever an UmCarouselItem gets
activated (clicked).
It automatically activates the first UmCarouselItem of the current
vsible page.
The visibility of the go-back and go-next button is automatically
set based on the number of children.
These changes are according to the new User Accounts panel mockups
at https://wiki.gnome.org/Design/SystemSettings/UserAccountshttps://bugzilla.gnome.org/show_bug.cgi?id=767065
