Memorize expanded folder structure in project file

When I close and re-open a project that I've been working on, the expanded folders in the project folder hierarchy are forgotten and all the folders are collapsed. In my case very few of my projects have files I work on that are near the root level of the folder hierarchy, so I usually find myself spending several moments re-establishing the desired expanded folder structure every time I resume work on my project. It would be nice if SublimeText could memorize what the structure was when I was last working on the project.