Demo8 - Arrays of groups

Aim of demo:

Demo8 shows two ways of implementing lists of settings groups of type TElem.

What it does and how it's done:

Extra:

It could be tricky making an implementation where a group can have several sub groups with the same group name. (This often occurs in XML structures.) PtSettings is not designed with that in mind. However, doing so would make such settings groups incompatible with storages other than XML storages.