Temporarily disable drawing of FileGroups on a PackageDiagram.
Remove IFileGroupMgr.getGroupPkg() and IFileGroupMgr.setGroupPkg() in
favour of the new IPackageMemberMgr methods.
Add a new setPackageOfMember() variant where the scopeId parameter
defaults to SCOPE_NONE.
Rename IPackageMemberMgr.MEMBER_TYPE_x to TYPE_x, to make the code
shorter.
Move the getLocation() and setLocation() methods out of IActionMgr, and
replace them with getMemberLocation() and setMemberLocation() methods in
IPackageMemberMgr.