Change Icon of Custom Form Extension for Work Item View

[SteffPoint]

Is there any possibility to change the standard Icon of a custom created form extension?

For the development of the custom formextension the polarion example "com.polarion.example.formextension" was used. The development itself took place in Eclipse Jee. In the standard, it displays the "gears Icon" in the Work Item Form:



Maybe interesting fact: The DOM-source of this Icon points to: /polarion/ria/images/fields/extension.png