GROUP SAVE MULTIPLE MAPS INTO A SINGLE FILE

I have found out that for my workflow I prefer having multiple tabs for the same project, rather than having to navigate a very large map. It would be great to be able to save all the tabs as a project in a single file. So when I have to recall that project, I get all the tabs opened just by clicking a single file.

Currently what I have to do is open file by file and then "Merge all Windows". It's a valid workaround, but not as efficient as having everything in a single file.