Decision screen fixes and enhancement of Decisions django-admin screen

Fixes for [kanban 1187223](https://aptivate.kanbantool.com/boards/5986-econsensus#tasks-1187223) and [kanban 1187225](https://aptivate.kanbantool.com/boards/5986-econsensus#tasks-1187225). django-admin screen enhancements to help with testing.