Steps to Reproduce

run the attached examples for (grid, listbox, tree)
hide columns using the buttons below or column header menu

Actual Result

the header and cell widths get out of synch

Expected Result

consistent header/cell widths

Debug Info

added red border styles to highlight the problem (not causing the problem)

Root Cause

possible cause: headers and cells are hidden using different styles
visibility: hidden vs display none

Workaround

using an hflex width instead of a %-width seems to avoid the problem

instead of this

			<listheader id="lh1" label="aaa" width="25%"/>
			<listheader id="lh2" label="bbb" width="25%"/>
			<listheader id="lh3" label="ccc" width="25%"/>
			<listheader id="lh4" label="ddd" width="25%"/>

use this:

			<listheader id="lh1" label="aaa" hflex="25"/>
			<listheader id="lh2" label="bbb" hflex="25"/>
			<listheader id="lh3" label="ccc" hflex="25"/>
			<listheader id="lh4" label="ddd" hflex="25"/>