If the user presses 'Cancel' when modifying colors using the Color Picker within the Curve Editor, the curves points are all transformed.
Issue is reproducible in the below engine versions:

4.8.3 - 2634408
4.9.2 - 2707645
4.11.0 - 2712527

Steps to Reproduce

1. Create a new blank 4.9.2 blueprint project.
2. Enable the 'Show Engine Content' option within the content browser.
3. Open the 'C_Sky_Horizon_Color' Color Curve.
4. Double click on one of the color/gradient handles at the bottom of the curve editor to open the Color Picker.
5. Press 'Cancel'

Outcome - Points along the curves drop to a very low point on the graph and almost seem to stack upon one another.

Expected - Cancel will close the Color Picker and nothing happens.

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Affects Versions4.
Target Fix4.11
Fix Commit2781805
Main Commit2800829
CreatedOct 1, 2015
ResolvedNov 26, 2015
UpdatedJan 13, 2021
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