Support for the vscode "multi-root workspaces" feature

[stefaanv]

There is a present no way to change the interface color when using the vscode "multi-root workspaces" feature

Desired solution
Some subtle indication of which root folder the current file belongs to. For instance, coloring the editor tab. I believe changing the whole color scheme might be distractive and misleading. (there may be files of different root folders open in one editor)

Alternatived
This question was requested to the visual studio team in this issue but got rejected.

Additional context
I us the multi-root workspaces to edit backend, frontend and shared code in the same vscode instance because it prevents from having to Alt-Tab between editors and allows to edit files from different folders side-by-side. The lack of colorization to indicate the folder is a big downside.

[johnpapa]

Thank you @stefaanv for creating this issue!