Fix LT-21980: Crash changing or modifying grammatical info #235
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I created BeforeChange and AfterChange events to delay the refresh of the data tree. BeforeChange sets DoNotRefresh and AfterChange adds RefreshDataTree to the UI thread's queue. I tried using BeforeSelect and AfterSelect, but there are actually two calls to AfterSelect and it wasn't clear that I could catch only the second call. Also, it would force a refresh of the data tree even if nothing was changed.
This change is