set option if want order column has checkbox

[joefreire]

i has a problem to order a column with this library, i fix this with this file

[mpryvkin]

Thanks for the PR, that's definitely helpful.

[mpryvkin]

This needs more work than I initially thought. The problem is that the fix you're suggesting will make checkbox column orderable (because default value is true, see columns.orderable) unless disabled by orderable: false option. That is undesirable.

I need to find a way to detect whether orderable is specifically set in column options, or use false as default value.