javascript adjust content wrapper on resize

Performed a major overhaul on the resizable widget to add resizable handles outside of the table, so now the resizable handles can be used over the entire height of the table!.

In v2.21.5, this widget now works with the columnSelector widget & tables with margins (see issue #864).

In v2.22.2, resizable will now work with tables inside an overflow wrapper (see issue #953).

A resizableReset event can be triggered to reset the resizable columns to their default widths.

A resizableUpdate event can be triggered on the table to update the resizable handles.

In v2.28.8, added the resizable_includeFooter option.In v2.29.0, added a resizableComplete event.No longer necessary as the resizable widget no longer adds elements inside the table header cells. Please include at least a in the cell to allow it to render properly ( ref). IMPORTANT The resize div ends up with a zero height if the header cell is empty.Make sure it is set to false (default setting).

IMPORTANT The resizable will not work properly if the widthFixed option is set to true.

IMPORTANT If using jQuery versions older than 1.8, css box-sizing for the table MUST be set as box-sizing: content-box or the resizable widget will not work properly.

Javascript adjust content wrapper on resize