Why does the framework store the LayoutDocument on the right side in a new LayoutDocumentPaneGroup after vertically splitting the document window on the right? And when the left window is closed, why does the parent of the right split window change from LayoutDocumentPaneGroup to LayoutDocumentPane type?
Is there a way to achieve that, regardless of whether it is a split screen or other LayoutDocument document windows, only one LayoutDocumentPaneGroup is stored, and after splitting the screen, the windows only add LayoutDocumentPane under the originally defined LayoutDocumentPaneGroup parent, and when the left document window is closed, only the LayoutDocumentPane in the LayoutDocumentPaneGroup is removed, instead of repeatedly changing the parent type of the document after splitting the screen?