Auto Exposure Basic disables histogram min/max controls.

Working as expected in 4.19 CL# 4033788 and 4.20 CL# 4369336

Found in 4.21 Preview 1 CL# 4435822 and 4.22 CL# 4448303

This is a regression


Steps to Reproduce
  1. Open the Editor
  2. Add a post process volume and set it unbound
  3. Change the Exposure Metering Mode to "Auto Exposure Basic"
  4. Go to Show > Visualize > HDR (Eye Adaptation) Histogram
  5. Change the Min/Max Brightness in the post process volume exposure controls

The Histogram Min/Max (and/or EV100) affect the visualizer but are disabled unless using Auto Exposure Histogram for Metering Mode

Histogram Min/Max should be editable using Auto Exposure Basic

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Affects Versions4.214.22
Target Fix4.21
Fix Commit4496914
Main Commit4551290
Release Commit4496914
CreatedOct 11, 2018
ResolvedOct 22, 2018
UpdatedNov 8, 2018