Allow defining multiple orders for livetable's sorting

I will provide an example on the RN application sorting, see currentSort.png

We would need a primary order and a secondary order: have first the non-released versions listed first, then the rest of the releases be sorted by release date.

Unfortunately, sorting by 'Released?' column breaks the 'Release Date' secondary sort, see releaseSorting.png

Ideally, the developers could decide how many sort order fallbacks they would provide for a livetable and not just be limited by 1.