Sort index not properly updated when doing multiple push + set of resourcearray

[joepio]

• Push a value to ResourceArrray
• Push another value to that ResourceArray
• Set a new ResourceArray
• Index is not properly updated

[joepio]

So @Polleps simply disabled to_sortable_string, which only converted arrays to counts. The original idea of this was that a sensible way to sort resource array values, was to just count them. But I suppose this does break some things, and Polle's fix (removing the sortable string conversion) results in a pretty sensible sort: the alphabetical value of the first item.