Fix deletion of sb-volume from statusbar.

_desktop/qtile/config.py

@@ -139,6 +139,10 @@ screens = [
                     update_interval=1,
                     func=lambda: subprocess.check_output("sb-network").decode(),
                 ),
+                widget.GenPollText(
+                    update_interval=1,
+                    func=lambda: subprocess.check_output("sb-volume").decode(),
+                ),
                 widget.GenPollText(
                     update_interval=1,
                     func=lambda: subprocess.check_output("sb-battery").decode(),