[polari] mainWindow: Disconnect accountsMonitor signal

[Florian Müllner <fmuellner src gnome org>]

commit 9988ed931ab6966823d4f618a0f28e7dc4ce256f
Author: Florian Müllner <fmuellner gnome org>
Date:   Sun May 12 16:00:31 2019 +0000

    mainWindow: Disconnect accountsMonitor signal
    
    When set up to run in the background, the accountsMonitor will outlive
    the window, so we need to disconnect any signals to avoid warnings.
    
    https://gitlab.gnome.org/GNOME/polari/merge_requests/120

 src/mainWindow.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/mainWindow.js b/src/mainWindow.js
index e31e8ec..b35d310 100644
--- a/src/mainWindow.js
+++ b/src/mainWindow.js
@@ -167,8 +167,8 @@ var MainWindow = GObject.registerClass({
         });
 
         this._accountsMonitor = AccountsMonitor.getDefault();
-        this._accountsMonitor.connect('accounts-changed',
-            this._onAccountsChanged.bind(this));
+        this._accountsChangedId = this._accountsMonitor.connect(
+            'accounts-changed', this._onAccountsChanged.bind(this));
         this._onAccountsChanged(this._accountsMonitor);
 
         this._roomManager = RoomManager.getDefault();
@@ -264,6 +264,8 @@ var MainWindow = GObject.registerClass({
 
         this.active_room = null;
 
+        this._accountsMonitor.disconnect(this._accountsChangedId);
+
         this._roomManager.disconnect(this._roomsLoadedId);
         this._roomManager.disconnect(this._roomRemovedId);