Undo objects may not be null and ArgumentNullException errors are thrown on overriding preset with the existing preset asset.

Steps to repro:
1. Open the attached project.
2. Select the BoxCollider preset asset.
3. Click on the preset icon in the inspector.
4. Replace & Save the preset.

Actual Result:
Exceptions are thrown in the console.

Expected Result:
The Exceptions should not occur in the console.

Reproducible in:
2019.3.0a6.

Working Fine in:
2019.3.0a5, 2019.2.0b6.

Environment:
Windows & Mac.

Stack trace:

Undo objects may not be null.
UnityEditor.ContainerWindow:InternalCloseWindow()

ArgumentNullException: Value cannot be null.
Parameter name: target
UnityEditor.Presets.Preset.ApplyTo (UnityEngine.Object target) (at C:/buildslave/unity/build/Modules/PresetsEditor/Public/Preset.bindings.cs:26)
UnityEditor.Presets.PresetContextMenu.RevertValues () (at C:/buildslave/unity/build/Modules/PresetsEditor/PresetContextMenu.cs:24)
UnityEditor.Presets.PresetContextMenu.OnSelectionChanged (UnityEditor.Presets.Preset selection) (at C:/buildslave/unity/build/Modules/PresetsEditor/PresetContextMenu.cs:32)
UnityEditor.Presets.PresetContextMenu.OnSelectionClosed (UnityEditor.Presets.Preset selection) (at C:/buildslave/unity/build/Modules/PresetsEditor/PresetContextMenu.cs:47)
UnityEditor.Presets.PresetSelector.OnDisable () (at C:/buildslave/unity/build/Modules/PresetsEditor/PresetSelector.cs:298)
UnityEditor.ContainerWindow:InternalCloseWindow()