Property Table rendering very slow in 4.19 (regression)

Editor frame rate is very slow rendering the Property Table in 4.19.  This is a regression from 4.18

Showing frame-rate in the editor with the property editor open shows really high GPU time:

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Without the property Table open, gpu time is normal

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Probably property Table is trying to draw off screen elements?

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1. Open QAGame Project
2. View all static meshes in the content browser
3. Right click
   1. Wait for all assets to load
4. Select "Asset Actions" > "Bulk edit via property matrix..."
5. Observe editor frame rate is very low while the window is open
   1. Close the window
6. Observe editor frame rate returns to normal