I'm writing a project system extension for VS 2017, and each project in my language has one file that's the "startup file". I want that file to appear bold in the Solution Explorer.
Python Tools for VS does what I'm looking for, but my extension is built on the new project system framework (CPS). The CPS way to change the appearance of Solution Explorer items is to implement IProjectTreePropertiesProvider, but I don't see any way to change the text style with it -- only the icons.