all stained glass damage values revert to 0

[Riot]

including when undoing a command that modifies stained glass - all damage values end up zero, and in //replace user-specified damage values are ignored for stained glass (id 95).

[Jason Jones]

https://bitbucket.org/minecraftonline/worldedit/commits/cf3bba45845d0431abfef787064cef14451c9647?at=master