Update Labeled javadoc, for RTL orientation, methods "setContentDisplay( RIGHT / LEFT )" get opposite results.

8.0 b65, set orientation of Scene to RTL, then the methods setContentDisplay() and setAlignment() Labeled get opposite result for LEFT and RIGHT.

*** java doc ***
public final void setContentDisplay(ContentDisplay value)
Sets the value of the property contentDisplay.
Property description:
    Specifies the positioning of the graphic relative to the text.


public final void setAlignment(Pos value)
Sets the value of the property alignment.
Property description:
    Specifies how the text and graphic within the Labeled should be aligned when there is empty space within the Labeled.