Ordering of missing values for ListData

[usajusaj]

Missing values in List of dicts table are pulled to the top when using ascending sorting. This might be unexpected for some users, therefore it would be convenient having an "order_null_last" or similar parameter in table meta/kwargs. I've made a hard-coded quick fix in a fork here: https://github.com/usajusaj/django-tables2/commit/ec27b7ff5915bee1fc0c431c00696599c9107311 but that's far from being a proper solution.

[jieter]

Fixing the edge-cases of sorting ListData is not something very high on my list, as we use the database to do the sorting in most if not all of our production code. If someone has the need, patches are welcome, but make sure to include proper testing.

[sanderbrauwers]

Very much need this!

[jieter]

Like I said: patches welcome!