Add -GroupBy in UDGrid

[mkellerman]

Would love to see a way to have a UDGrid with rows that show a grouping.

For example:

Day	Invoice	Total
January
2	0348	248.35
7	0349	126.14
18	0350	821.99
February
27	0351	643.50

So the data would already have a 'Month' property, and you could simply tell UDGrid to group the data by that value.

OR

You do whatever grouping you want in PS, and Out-UDGridData detects that the data is in a group, and uses the Name and the Group property to generate the UDGridData properly.

And the HTML is quite simple, since we already know the number of properties/header, all you need to add is:

<tr>
    <td colspan=3>January</td>
</tr>