Add a new set of transparent navigation buttons.

These will be used in the transparent wml message dialog.

data/gui/default/widget/button_25x25.cfg

@@ -112,5 +112,31 @@
 	"buttons/right_arrow-button"
 }
 
+# The transparent version
+
+{_GUI_DEFINITION
+	"down_arrow_transparent"
+	"Down arrow button for a transparent scrollbar."
+	"buttons/downarrow-button_transparent"
+}
+
+{_GUI_DEFINITION
+	"up_arrow_transparent"
+	"Up arrow button for a transparent scrollbar."
+	"buttons/uparrow-button_transparent"
+}
+
+{_GUI_DEFINITION
+	"left_arrow_transparent"
+	"Left arrow button for a transparent scrollbar."
+	"buttons/left_arrow-button_transparent"
+}
+
+{_GUI_DEFINITION
+	"right_arrow_transparent"
+	"Right arrow button for a transparent scrollbar."
+	"buttons/right_arrow-button_transparent"
+}
+
 #undef _GUI_DEFINITION
 #undef _GUI_RESOLUTION