private boolean isSelectAllOnMouseClick() {
		Object value = getClientProperty( SELECT_ALL_ON_MOUSE_CLICK );
		return (value instanceof Boolean) ? (boolean) value : selectAllOnMouseClick;
	}
Caret that can select all text on focus gained.
Also fixes Swing's double-click-and-drag behavior so that dragging after
a double-click extends selection by whole words.

@author Karl Tauber
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatCaret.java