Hi,
I have an idea, I would like to configure the label on the left side of the page tree to add an extension point that similars to the system and its submenus. As shown in Fig.
After I click the system option, the system options sub-options are displayed, then you can click on the demand to display the contents of the sub-options.
If I could also add an extension point that contained sub-options, it would save space in the content area and make our plug-in content look better.
About this idea,I do not know the current expansion point configuration can be done, if so please tell me the method, thank you.