Add Secondary Default Transition Parameter

Secondary Default (Audio) Transition: When cutting dialog and sound effects all day, I constantly apply a 2 frame audio fade to everything... but every once in awhile I try to get artsy and want to put a smooth long fade on some music.  I need to take my lazy bones off the ol' keyboard, grab the mouse and set it right where I want it and click the ol' "Apply Default Audio Transition From Playhead" button.  But, if we had a secondary default audio transition we could add, then things would get fast around here.  These hands we build for shortcuts.  You get the point.