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

src/com/sheepit/client/Client.java

@@ -346,8 +346,6 @@ public class Client {
 		}
 		
 		this.server = null;
-
-		this.gui.stop();
 		
 		return 0;
 	}

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

@@ -64,6 +64,7 @@ public class GuiText implements Gui {
 					}
 					else {
 						client.stop();
+						GuiText.this.stop();
 					}
 				}
 			});

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

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