If user add custom item definition and define it as structure, the item definition misses the structure icon set the attached picture. There is new custom structure item definition a without icon. Compare it with other structure item definitions.

Acceptance test

• Check added item definition has icon when it is top level
• Check added item definition has icon when used in nested level
• Check item definition has not structure icon when changed from structure to something else
• Check item definition has structure icon when changed from something else to structure
• Check item definition has structure icon if item definition is recursive