Saltcorn 0.6.4 is mainly a bugfix. Important bugs related to the following areas were fixed: tableless views, static assets provided by plugins, code editing field views, file uploads in tenants and forms in pop-ups. 

In addition, the administrators editing grid of the table data is now built on Tabulator, which provides a much better user experience. For instance, you can now edit cells individually. 

There is also a new plugin which allows you to build user views for grid editing of data based on Tabulator. Here you can define columns not just based on table be there but also join fields, aggregations, view links and action buttons