Tooltip messes up document table structure

[lukavdplas]

In the DocumentPreviewComponent, the iaTooltip is used on a <th> (table header) element. This seems to mess up the table structure (probably because of the pseudo-element created by the tooltip), which wasn't parsed properly when I tested it.

This can be fixed by applying the tooltip to a child of the header element. This fixed it for me:

<th>
    <span iaTooltip="...">...</span>
</th>