Hide away label on server reconnect.

Close #426

ui_swing/src/com/dmdirc/addons/ui_swing/components/AwayLabel.java

 import com.dmdirc.events.FrameClosingEvent;
 import com.dmdirc.events.ServerAwayEvent;
 import com.dmdirc.events.ServerBackEvent;
+import com.dmdirc.events.ServerConnectedEvent;
 import com.dmdirc.interfaces.Connection;
 import com.dmdirc.interfaces.WindowModel;
 
                 .map(Connection::isAway).ifPresent(this::updateVisibility);
     }
 
+    @Handler(delivery = Invoke.Asynchronously, invocation = EdtHandlerInvocation.class)
+    public void handleReconnect(final ServerConnectedEvent event) {
+        updateVisibility(false);
+    }
+
     private void updateVisibility(final boolean away) {
         setVisible(useAwayIndicator && away);
     }