[EAGLE-852] Application start button should be disabled when it's running, and the same for stop button.

EAGLE-852 Application start button should be disabled when it's running, and the same for stop button.
- Add disabled judgment logic.

executable | status  | start button | stop button
---|--- | --- | ---
Y | INITIALIZED | Y | N
Y | STARTING | N | N
Y | RUNNING | N | Y
Y | STOPPING | N | N
Y | STOPPED | N | N
N | INITIALIZED | N | N

https://issues.apache.org/jira/browse/EAGLE-852

Author: chitin <chitin1027@gmail.com>

Closes #767 from chitin/EAGLE-852-startbutton.
1 file changed