Lua Extension dialog list does not allow multiple selections in OS X
This issue observed on Macbookpro with OS X Yosemite and VLC 2.2.1. See the attached test.
The Lua README for extensions says multiple selections are allowed so this seems to be a defect and not a feature request. Windows does allow multiple selections.
Without multiple selections, implementation of my Resume Media extension on OSX would be severely limited if not useless.
(The 'growing list' behavior was reported in ticket #14457 (closed).)