MeshWidget auto col sizing only working once

Steps to Reproduce

run either attachment of grid-auto-size.zul, listbox-auto-size.zul, treecol-auto-size.zul (issue is the same for all MeshWidgets)
1. double click the column resizer of any column
2. double click the column resizer of a different column

Current Result

1. the column auto-sizes to the minimum width
2. the other column does not auto-size and stays at its original width

Expected Result

when double clicking a column resizer the column width should always auto fit

Debug Info

(this used to work in ZK 7)

• resizing a column manually and then double clicking its resizer several times leads to alternating width between the original and the manually resized width
• Listbox listheader also has such bug

Root Cause

the cached minimum widths for each HeaderWidget are not reset before auto sizing

Workaround

applying the attached patch meshwidget-auto-size-patch-ZK-3660.js globally will fix this issue