Static Table component issues

[bartaz]

I tried to use Table component to render a static table and found it quite hard to use and debug.

It seems to be making a lot of assumptions about children nodes.

1 Table doesn't render if there is no header row.

If there are only data rows (no heading) table just silently doesn't render at all:

<Table>
   <TableRow>
      <TableCell>Test</TableCell>
   </TableRow>
</Table>

Seems like a row with tableHeading is required, even if not needed at all.

2 Table throws an error if there are now rows

If there are no data rows (table is empty or has only heading) Table throws an error that it cannot call forEach:

<Table></Table>

Expected

Table component (especially if meant to be used as simple static component) shouldn't make the assumptions about existence of it's children.
If I call <Table></Table> I expect empty table to be rendered. If some rows are required for some reason that should at least clearly warn/error about it in the console (not throw a JS error).
Ideally tableHeading should not be needed by the table. It's weird to be using hasHeading on a Table to hide heading row. Especially that it's still required in the markup.