From the KnowledgeBase:
Solution Id: S-061384
Product:SolidWorks Enterprise PDM 2013 CAD Editor
Sub-Area:Workflow / Lifecycle
Question:Is it possible to use our own custom icons for workflow states in Enterprise PDM?
Answer:It is only possible to use the default or predefined state icons that are available when clicking on the 'Change Icon' option when editing state properties. Note SPR 561926 that requests custom icon functionality.
It's 2018 and sadly we have entire conversations in emojis. Why is this not resolved?