Is there anyway to change our widget blueprint icon in the palette?

Hello, Thanks for replying and it helped me. I already successfully change the Icon however there still a problem in there.

The hierarchy icon is changed, but the palette still not changed.

I already done it like how Unreal handle it in the UMGStyle.cpp yet this is the result. Do you have any idea about whats wrong with this?

I really appreciate your answer, thanks!