Auto-Import (maven) projects on copying a folder into a workspace

When starting VSCode with a new workspace, it will auto-import existing (maven) projects into the underlying jdt.ls workspace (which is intuitive) when "Import on First time startup" is set to "automatic" (or "interactive" which will ask you before it does).

Once that process is finished it will not ask you to auto-import projects which are copied into the workspace (common problem in classes/courses) and you have to run "Java: Import Java projects in workspace" explicitly.

It would be great if the extension would scan for newly added projects and either import them automatically or display a prompt that asks you if it should do it.

This is a spin-off of #1672 additional information can be found there