Collapse Duplicate Directories

[wixbot]

Because each folder in a path must be defined as individual Directory elements, Directory elements provide the highest chance of conflict in setup authoring. That often leads teams to centralize the Directory elements in one (or a couple) files to prevent the conflicts. That leads to merge conflicts when different developers edit those few files.

All of this can be avoided if Directory elements are allowed to be duplicated. When combined with feature 4258, limiting this feature to private identifiers prevents the undesirable side effect where one DirectoryRef could pull in many Fragments.

Originally opened by firegiantco