When actively disconnecting, judge the problem of state error.

[CaiJingLong]

When actively disconnected, the unconnected state should be ignored.

[AgainPsychoX]

That is interesting, that I had occurred no errors because of that, but I ashamed to let it happen XD

Thanks.

[CaiJingLong]

In the example, follow these steps:

1. connect to paired device to chat.
2. click a device to connect a device.
3. close the chat page.
4. click the same device again to chat.

Then my bluetooth device will throw an exception.

[AgainPsychoX]

Thanks for satisfying my curiosity. Anyway the change should be merged by now. If necessary, patch version could be published in few hours.