fukuda

servo_power_monitor: TODO list

1

- [x] Add annotation in graph - [x] Automation of workload running & stopping the measurement - [x] Change from "Stop" button to "Cancel" button: cancel measurement & workload -...

while the power measurement, dut serial port is sometimes disconnected unintentionally. 

In servo_power_monitor page, it is possible that there is no annotation point. So we should avoid adding annotation under such a situation.