ListWithDetail renderer should have default selection

[edgarmueller]

Describe the bug
the ListWithDetail renderer should have default selection, e.g. the first item in the master list, if applicable

To Reproduce
Run angular-material ilst-with-detail example.

Expected behavior
The first item should be selected.

Screenshots

Used Setup (please complete the following information):

• Framework: angular
• RendererSet: material

[edgarmueller]

Fixed via #1174