implement Array element preview

[in0finite]

Array/List elements now have a text "preview", instead of just the element index.

After :

Before :

Sorry for bad code formatting.

[msamora-supernatural]

Adding a refresh keeps the element previews up to date.
public override void Refresh() { base.Refresh(); foreach (var element in elements) { if (element.Value != null) { element.NameRaw = element.NameRaw.Split(':')[0] + ": " + GetArrayElementPreviewText(element.Value); } } }