Document & Text color choices override each-other

[Alex]

Steps to reproduce

When changing the background color, cancelling, and changing the text color instead in document properties it changes the value for both fields.

1. Click Document Properties -> Design -> Chose Background Color
2. In the Background Color editor, select a color and then hit Cancel
3. Click on Chose for Text Color and make a selection
4. Click Ok to close out of the Document Properties dialog

Expected result

Document text color is changed

Actual result

Document background color AND text color are changed

Other details (browser, OS, CKEditor version, installed plugins)

[Marek Lewandowski]

DUP of #16999