LibGUI: Use a separate data role for the table model sorting order.

This allows data to be displayed nicely while sorting happens based on some
underlying raw data. :^)

Applications/Launcher/main.cpp

@@ -51,8 +51,7 @@ public:
                     perror("execl");
             }
         };
-    }
-    virtual ~LauncherButton() { }
+    } virtual ~LauncherButton() { }
 
 private:
     String m_executable_path;