Could someobody help me with the Legacy Extraction window?

[artificeren]

So it seems to me that the new Legacy Extraction window is pointlessly small, requiring us to scroll to see all the legacies, when it could easily just be taller and show them all at once. I did some hunting and found the names for the various elements:
ItemAdvancement_ExtractLegacy_Window
ItemAdvancement_ExtractLegacy_Background
ItemAdvancement_ExtractLegacy_TitleText
ItemAdvancement_ExtractLegacy_TitleBar
ItemAdvancement_ExtractLegacyListBox
ItemAdvancement_ExtractLegacyListBox_Bg
ItemAdvancement_ExtractLegacyScrollbar
ItemAdvancement_ExtractLegacy_SelectButton

Can anybody tell me how to use the SkinDefinition.xml file to make this window taller?