Emit new events beforeAction and beforeExec#1330

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b-jsshapiro wants to merge 2 commits intotj:masterfrom

Buttonsmith:emitBeforeAction

Commits on Aug 13, 2020

Emit new events beforeAction and beforeExec before internal and (respectively)
jsshapiro
committed

Commits on Aug 18, 2020

Simplified the _emitToTree logic per my note to John Gee.
jsshapiro
committed