While trying to understand and use the grouping example, I found it impossible to get the horizontal bar to disappear after trying to change the widths of columns and after trying different options to resize the grid box. I am using Google Chrome. Is there a fault in the code where it does not calculate the full width of all columns and ignores the width of the first column with the check boxes in the grouping example?

I have tried
$grid["autowidth"] = true;

and I have tried

$grid["auto_width"] = false;
$grid["shrink_to_fit"] = true;
$grid["width"] = 800;

In both cases, the horizontal bar stays at the bottom, cutting off the actions column.

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Now, I made the grid fixed size but I want to get rid of the horizontal bar which is not working.