Version 0.9.0

• It is now possible to sort for related entities too. Previously sorting was disabled on relation fields. The sorting will happen on the attribute of the related entity that is detected as a candidate for the name of the related entity. This can be driven by setting __possible_field_name_defaults__ on the table filler or in __table_options__. On MongoDB this requires MongoDB3.2+
• Fixed a bug that lead to crashes for a missing .chain_validation property on recent TurboGears versions that supported chain validation.
• Fixed a bug that lead to related entities that were omitted in the edit forms to be cleared if they were omitted with __limit_fields__ instead of __omit_fields__. This in particular lead to users losing their groups when a group was edited in tgext.admin.