This is a bit of a hack to get the country code property hooked up
and will require a rework when multiple provider support is being added.
As the default origin is not being used anywhere else in the code
it's currently not a problem that we're not tracking if the default
origin is being removed.
Additionally test-manager.c needed some adjustment.
And adapt to changes
It's easier to track changes if we are using GListModel than
a GList. Also, eventually we shall have multiple providers,
and we can use GtkFlattenListModel to merge multiple origins
without manually managing pointers ourself.
Since several widgets has APIs to handle GListModels, it will
also help us create widgets from GListModels easily.
* src/calls-manager.h: Add lookup function to header
* src/calls-manager.c: Implement lookup function to be used for the call
history, call notifier and call display
* src/calls-call-holder.c: Use calls_manager_get_contact_name ()
* src/calls-notifier.c: Use calls_manager_get_contact_name ()
The manager is a central place for handling data e.g. calls history and
provider managment.
This introduces only the base for feature work. Therefore it manages
only the provider for now, but the manager isn't yet used anywhere.
The propagets events from the provider and origins. It also adds a new
signal called `error`. The `error` signal should be emited only when
something went wrong and we need to inform the user about it, containing
the message to be displayed to the user. Windows should connect to the
event and display a in-app-notification on error. This event isn't
emitted, because the plugins don't give us a usable error.
