Display Filament Sensor data on graphic LCD

Added support to show the filament width on the status line of the
graphic LCD.  The status will show for 5 sec and then switch over to
data.  Status can be seen by clicking the button.

Marlin/dogm_lcd_implementation.h

  // Status line
  u8g.setFont(FONT_STATUSMENU);
  u8g.setPrintPos(0,61);
- u8g.print(lcd_status_message);
+ #ifndef FILAMENT_LCD_DISPLAY
+ 	u8g.print(lcd_status_message);
+ #else
+	if(message_millis+5000>millis()){  //Display both Status message line and Filament display on the last line
+	 u8g.print(lcd_status_message);
+ 	}
+ 	else
+	{
+	 lcd_printPGM(PSTR("dia:"));
+	 u8g.print(ftostr12ns(filament_width_meas));
+	 lcd_printPGM(PSTR(" factor:"));
+	 u8g.print(itostr3(extrudemultiply));
+	 u8g.print('%');
+	}
+ #endif 	
 
 }