small improvement: implement "best fit" logic for columns in Test Parameters dialog box

By default, it seems that the columns in the Test Parameters dialog are spaced evenly.

So every time I open the dialog I have to resize the columns, because typically the final column (Value) has more data, and not all the data is visible, whereas the other columns are much wider than their actual data.

It would be very helpful if the columns were automatically resized according to "best fit" logic.

Would also be nice if the tool-tip that displays the text when you hover over the cell was maintained as long as the cursor stays on the cell - currently it disappears after a couple of seconds.

example: