Improve the communication and make user UI friendly

1. Improve the quality of the communication. 
2. Improve the network scan feature.
3. T3000 will scan device via serial port with baud rate both “9600” and “19200”.Before we only use 19200.
4. Add feature user can add device not through the scan command.
5. Bacnet programming feature support both lower-case and upper-case now.
6. All the Bacnet list (input/output/…), it will auto scroll, when user press up or down , the list item will automatically up and down.
7. Hide the graphic useless button. Add button feature to load factory default.(For Bacnet device)
8. Improve code to support read TSTAT6 through Zigbee module. Now it read smoothly.