| rect | Rect to render the text in. | 
| label | Label to render. | 
| selected | Selected state used for determining text color. | 
| focused | Focused state used for determining text color. | 
Draws a right aligned label that have correct text color when selected and/or focused.
This method uses the normal, focused, onNormal and onFocused GUIStyleStates of TreeView.DefaultStyles.label to ensure correct rendering of text above a selection background.