let one category be embedded in the ViewSelector

Summary:
only possible for all albums, all artists and all genres

related to T11154

Test Plan:
after adding
[Views]
EmbeddedView=3

Genres are added to ViewSelector list

properly display icons in views list including albums (default icon and cover)

introduce ViewsListData to handle data of the list of views

to be used by both the model and the ViewManager class handling the
switch between views

if config changed, embedded category property may have changed

separate ViewsListData object from ViewsModel and use it

will allow sharing with the ViewsManager object

ViewsModel no longer have any properties