Fix processing of GitLab links (2 directory levels under user or organization name)

[Poikilos]

https://gitlab.com/W4Games/build/w4build.git goes into ~/Downloads/git/build/w4build

but should go into

• ~/Downloads/git/W4Games/w4build
• or ~/Downloads/git/W4Games/build/w4build
  • if so, maybe make a linuxpreinstall-folder.json to mark the build folder: folder_meta = {'folder_type': "group"}