Do we need alwaysWaitWhileLoading?

[lukaw3d]

Related to #691 (comment)

the current implementation of Table only considers isLoadin if there are no rows:

{!rows && isLoading && (
  <SkeletonTableRows rowsNumber={rowsNumber} columnsNumber={columns.length} />
)}

Some tables now have isLoading combining multiple requests, so rows may be available with partial data that we don't want to show yet (we have alwaysWaitWhileLoading now). On the other hand, do any tables have isLoading but data is ready to display (does any table ever rely on !rows)?

Can we unify the behavior? If not, which behavior should be the default?