CORE-5015 Fixed name sorting in sharing dialog.

Refactored the DiskResourceColumnModel#DiskResourceNameComparator to no longer sort based on File/Folder types (which no longer has an effect with remote sorting).
Refactored the "name" ColumnConfig in DiskResourceColumnModel into a createDiskResourceNameColumnConfig method.
Refactored DataSharingDialog to build its "name" ColumnConfig with this new method.