Before the commit 4b111f7701 it was possible to create new perspectives from projects not available on the list.
It would be possible to provide a path to a project that has not been open previously by emacs, and have the perspective created. Now that a match is required, it is not possible anymore, as the path provided is not one of the possible matches on the list.
This commit changes the behavior back to allow accessing projects that have not been visited before. Without this change, one needs to open a specific project first, using `C-x C-e` or `SPC f f` and then switch to the layout.
035fc2a648