The DMN model file can contain custom item definitions. These are then shown in the data type picker dialog. Currently these definitions are not sorted in the dialog. We should sort them and their attributes alphabetically (a -> z).

Possibility to change key for sorting shouldn't be implemented. If such requirement appears in future, will be implemented in separate jira.

Acceptance Test

• Ordering of A a B b C c doesn't result to A B C a b c
• Ordering is applied in properties panel, output data type selectbox
• Ordering is applied in Manage custom data type dialog
• Changes in Manage custom data type dialog are reflected into
  • Manage custom data type dialog
  • output data type selectbox