Potential fix for issue 448

Created originally on Bitbucket by davidnorth (David North)

Was already merged in Bitbucket before import, marked as merged by the import user

This is a patch for issue 448 (https://bitbucket.org/mercurialeclipse/main/issue/448/importing-project-set-with-multiple)

Unfortunately I've not been able to get the plugin to compile locally, so this is untested.