Item chosen from auto-suggest menu is not applied immediately

D&D a Pane
D&D a Button into the Pane
In the Content Panel, resize the width of the Button
Select the Layout Section of Inspector
Click inside the Pref Width TextField
Delete the text - NOTE - the auto-suggest menu appears but also shows focus (covered by DTL-6815)
Select the USE_COMPUTED_SIZE from the auto-suggest menu - BUG - the Button does not resize immediately. It only resizes once focus changes from the TextField.