Auto-reconnects when remotely disconnected/etc

Test case

Steps

1. Connect two clients to Quassel core, at least one of them Quasseldroid
   • E.g. desktop and Quasseldroid
2. Put Quasseldroid in the background
3. In the Core Info menu of the secondary client, disconnect the Quasseldroid that is in the background

Update: This seems to happen even when disconnecting locally, too!

Expected

Quasseldroid stays disconnected.

Actual

Quasseldroid eventually reconnects.

Additional

Running latest Quasseldroid, v1.2.2, and Quassel core 0.13.1, and only started happening with the recent connection logic rewrite.

I'm not sure exactly how long this takes, or if connection state changes trigger this. I'll continue to investigate this.