[TitledPane] the same background for collapsed and expanded state.

See an attached movie.

RULE ControlsAutomatedTestSuite/javafx/scene/control/test/TitledPaneTest/collapsibleTest Exception org.jemmy.TimeoutExpiredException: State 'Control having expected image' has not been reached in ... milliseconds

RULE ControlsAutomatedTestSuite/javafx/scene/control/test/TitledPaneTest/expandedTest Exception org.jemmy.TimeoutExpiredException: State 'Control having expected image' has not been reached in ... milliseconds