Volume and global events organized in groups or folders inside node editor list

[WalrusTR]

Actually volume/global events are just simply listen on the left of node editor window. You must assign them unique names, pull them up or down in the list, but there are cases where you need to use many events to accomplish the puzzle or there are many of the used in a specifc room/area. My suggestion is add the feature to group events under a unique label or a folder (much like Photoshop creates groups/folders inside a PSD file where you can move the layers) that can be renamed, changed its color with color picker and so on, also to keep everything well organized and reduce events list (that could be pretty long after a while).