Move GtkArrowType to where it is used in undeprecated api:
GtkMenuButton.
gtk_menu_button_get_menu_model
gtk_menu_button_set_use_popover
gtk_menu_button_get_use_popover
+GtkArrowType
gtk_menu_button_set_direction
gtk_menu_button_get_direction
gtk_menu_button_set_align_widget
<SECTION>
<FILE>gtkenums</FILE>
<TITLE>Standard Enumerations</TITLE>
-GtkArrowType
GtkAttachOptions
GtkBaselinePosition
GtkButtonBoxStyle
* @GTK_ARROW_RIGHT: Represents a right pointing arrow.
* @GTK_ARROW_NONE: No arrow. Since 2.10.
*
- * Used to indicate the direction in which a #GtkArrow should point.
+ * Used to indicate the direction in which an arrow should point.
*/
typedef enum
{