Cleanup get-password dialog:

Cleanup get-password dialog:

* hildon-widgets/hildon-get-password-dialog.[ch]

        (HildonGetPasswordDialogPrivate): gboolean get_old added

        (hildon_get_password_set_property): fixed broken 'numbers-only'
        and 'max-characters' cases; 'get-old' property added

        (hildon_get_password_get_property): added support for reading
        'numbers-only' properties; added missing break to 'domain' case.
        added 'get-old' property

        (hildon_get_password_dialog_class_init): 'domain' and
        'numbers-only' properties are now readable; 'get-old' property
        added

        (hildon_get_password_dialog_init, create_contents): everything
        that depends on the type of the dialog (i.e. 'get-old' property)
        is now done in create_contents after properties are initialized;
        fixed leaking group variable

        (hildon_get_password_dialog_get_type): empty function argument
        list replaced with void keyword

        (hildon_get_password_dialog_new): moved setting the labels of the
        get password dialog to init where it should be done; 'get-old'
        property set upon construction to achieve this

        (hildon_get_password_dialog_new_with_default): password argument
        declared const

        (hildon_get_password_dialog_get_password): type check added
        (hildon_get_password_dialog_set_domain): type check added; domain
        argument declared const; duplicate function declaration removed

        (hildon_get_password_dialog_set_title): type check added;
        new_title argument declared const

        (hildon_get_password_dialog_set_caption): type check added;
        new_caption argument declared const

        (hildon_get_password_dialog_set_max_characters): broken type check fixed
        (_invalid_input): gpointer data argument renamed unused