User Story

As a developer, I want to use multi-line headers in mesh components (listbox, grid, tree)

Currently, forcing line wrapping in header causes height calculations to be incorrect.

Header and body are separate tables, so they don't automatically account for each-other sizes.

Acceptance Criteria

Support multiline mesh headers (either by default, or with a multiline="true" attribute)

Details

ex: body height is incorrect with tall headers
https://zkfiddle.org/sample/1ftpptj/5-listbox-mulit-line-header-support