Add 500Kbps, 1Mbps and 2Mbps to the list of available serial speeds

Author: dsstutts

app/src/processing/app/AbstractMonitor.java

@@ -20,7 +20,7 @@ public abstract class AbstractMonitor extends JFrame implements ActionListener {
 
   private BoardPort boardPort;
 
-  protected String[] serialRateStrings = {"300", "1200", "2400", "4800", "9600", "19200", "38400", "57600", "74880", "115200", "230400", "250000"};
+  protected String[] serialRateStrings = {"300", "1200", "2400", "4800", "9600", "19200", "38400", "57600", "74880", "115200", "230400", "250000", "500000", "1000000", "2000000"};
 
   public AbstractMonitor(BoardPort boardPort) {
     super(boardPort.getLabel());