[DMN Designer] Relation: Add additional Properties to drill-down

The Properties Panel currently shows properties for Stunner-level "graph" components.

Further to DROOLS-2804, that added the generic support for "drill down" and ExpressionLanguage on LiteralExpression, this JIRA is to add support for the remaining properties that should be rendered when a component is "drilled down".

Properties on the Grid Level

The selection on the grid level should show the properties below. Please notice that selection of multiple cells, rows or columns should show empty properties panel.

(everything should have ID, Description properties. Components which inherit from "NamedElement" should also have Name property)

Relation

Selected item	Properties panel items	type
Row	n/a	n/a	n/a
Column	type Ref	ItemDefinition ref
Cell	ExpressionLanguage	URI

Manual Acceptance Test

• Switching between DRG and Grid editor, check proper fields shown
• Switching between rows, columns, cells in Grid editor, check proper fields
  • In same expression kind
  • Across different expression kinds
• Clear expression kind
• Read only mode - older asset version
• All Grid specific properties saved