BUG: Spark 2.6.3: "Preferences" Window "Apply" Button Stays Highlighted After Mouse-Over

Unlike the “Save” and “Close” buttons at the bottom of the “Preferences” window, the “Apply” button stays highlighted indefintately as soon as you move your mouse over it once.

This is a seemingly simply yet annoying asthetic bug in Spark 2.6.3.

Forgot to mention this occurs with HotSpot JRE 6.0 Update 29 on MS Windows 7 Enterprise.