tonytomov/jqGrid — pull request #352 by tjcrowder (2012-07-26 15:54:12+00:00)
Title: Add 'className' to 'groupHeaders' option in setGroupHeaders

In `setGroupHeaders`, this patch supports an optional `className` property on the column header definitions in `groupHeaders`. The class(es) are added to the `th` for the column header, to allow individual styling.