Add validation for missing properties when using the sort info editor

Set TP LTS 2016, no JSF UI

• Create a PP
• Add a quick filter
• Name it
• Add a sort order on common:size
• Change TP to 9.1

=> No validation error is shown about the missing property and package is generated with the sort order as if the property is still existing.
=> This might work for Studio but have serious consequences when deploying on the Nuxeo server, and it's hard to detect if you don't know exactly where to look for in Studio.