add sip registrars menu item
registrar dialog mockup
sketch registrars dialog
wip: RegistrarsModel
RegistrarDlg as gobject-style parameters
controller: report any weird dialog return
wip: RegistrarModel and RegistrarDlg
dialog: the model is a class attribute
wip: RegistrarModel and RegistrarDlg
dialogs: spinner timeout function
dialogs: builder is a class attribute
dialogs: code style fix
dialogs: treeview when offline
dialogs: show page according to selection
resources: registrar form
registrar: private attributes are properties
resources: more complex registrar form
dialogs: load data into widget
resources: registrars ui fixes
resources: add compatibility combo