Bugfix: c5997faec86cb27aa52b0dbfa2729ccc050d7181 introduced a regression, it failed to properly stop the client with swing UI

src/com/sheepit/client/standalone/GuiTextOneLine.java

@@ -45,6 +45,7 @@ public class GuiTextOneLine implements Gui {
 					}
 					else {
 						client.stop();
+						GuiTextOneLine.this.stop();
 					}
 				}
 			});