Repository Working Sets Appears In All Package Explorer Context Menus

[romeara]

Currently, no matter what is being selected, the context menu within the package explorer contains the entry for sorting into working sets. The menu option should only appear if the selection contains some combination of:

• project(s)
• a working set

It is permissible for the option to appear if even one element is of the above types - it should NOT appear if only other element types (such as files) are selected

[romeara]

Resolving this by restricting to projects only - unfortunately for now, this means if a project is open and all are selected, it won't appear