Get an overview of all screens from the model service.

GetScreensFromModelService

        private static IEnumerable<string> _allScreens;
        static BuildingBlockProvider()
        {
            List<string> screens = new List<string>();
            foreach (var screenModel in ServiceProxy.Instance.ModelService.Items.OfType<IScreenDefinition>())
            {
                if (screenModel.Members.Any(m => m.Attributes.OfType<IIsParameterAttribute>().Any(att => !(att.Parent as IScreenPropertyDefinition).PropertyType.Name.EndsWith("?")))) {
                    continue;
                }
                
                string name;
                var displayName = screenModel.Attributes.OfType<IDisplayNameAttribute>().FirstOrDefault();
                if (displayName != null)
                {
                    name = displayName.Value;
                    if (name == "$(UsersScreen_DisplayName)")
                        name = "Users";
                    if (name == "$(RolesScreen_DisplayName)")
                        name = "Roles";
                }
                else
                {
                    name = screenModel.Name;
                    var sb = new StringBuilder(name.Count() + 5);
                    sb.Append(name[0]);
                    for (int i = 1; i < name.Count(); i++)
                    {
                        char c = name[i];
                        if ((int)c >= 65 && (int)c <= 90)
                            sb.Append(" ");
                        sb.Append(c);
                    }
                    name = sb.ToString();
                }
                screens.Add(name);
            }
            _allScreens = screens.OrderBy(t => t).ToList();
        }