davidstutz/bootstrap-multiselect — pull request #395 by ehouais (2014-10-06 16:46:45+00:00)
Title: Filtering & optgroups

Altered filtering rules for optgroups
* Optgoup header stays visible if at least one of its items is visible
* All optgroups items stay visible if optgroup name satisfies filter

The resulting behaviour seems more consistent to me.