Enable the unit test for tmp_server_list.

It involves the tmp_connect class since it has access to the class, not
really clean, but marked for unit tests only.

src/gui/dialogs/mp_connect.cpp

@@ -181,5 +181,10 @@ void tmp_connect::pre_show(CVideo& video, twindow& window)
 
 }
 
+tdialog* tmp_connect::mp_server_list_for_unit_test()
+{
+	return new tmp_server_list();
+}
+
 } // namespace gui2
 

src/gui/dialogs/mp_connect.hpp

@@ -22,6 +22,8 @@ namespace gui2 {
 
 class tmp_connect : public tdialog
 {
+	/** The unit test needs to be able to test the tmp_connect dialog. */
+	friend tdialog* unit_test_mp_server_list();
 public:
 	tmp_connect();
 
@@ -35,6 +37,13 @@ private:
 
 	/** The host name of the selected servef. */
 	tfield_text* host_name_;
+
+	/**
+	 * The unit test needs to be able to test the tmp_connect dialog.
+	 *
+	 * @returns                   A newly allocated tmp_server_list.
+	 */
+	static tdialog* mp_server_list_for_unit_test();
 };
 
 } // namespace gui2

src/tests/gui/test_gui2.cpp

@@ -84,7 +84,15 @@ std::string unit_test_mark_as_tested(const tdialog& dialog)
 	return dialog.window_id();
 }
 
-}// namespace gui2
+
+class tmp_server_list;
+
+tdialog* unit_test_mp_server_list()
+{
+	return tmp_connect::mp_server_list_for_unit_test();
+}
+
+} // namespace gui2
 
 namespace {
 
@@ -225,7 +233,7 @@ BOOST_AUTO_TEST_CASE(test_gui2)
 	test<gui2::tmp_create_game>();
 	test<gui2::tmp_login>();
 	test<gui2::tmp_method_selection>();
-//	test<gui2::tmp_server_list>(); /** @todo ENABLE */
+	test<gui2::tmp_server_list>();
 	test<gui2::ttitle_screen>();
 	test<gui2::ttransient_message>();
 //	test<gui2::tunit_attack>(); /** @todo ENABLE */
@@ -250,9 +258,6 @@ BOOST_AUTO_TEST_CASE(test_gui2)
 	list.erase(
 			std::remove(list.begin(), list.end(), "unit_attack")
 			, list.end());
-	list.erase(
-			std::remove(list.begin(), list.end(), "mp_server_list")
-			, list.end());
 	list.erase(
 			std::remove(list.begin(), list.end(), "tooltip_large")
 			, list.end());
@@ -501,6 +506,15 @@ struct twrapper<gui2::teditor_settings>
 	}
 };
 
+template<>
+struct twrapper<gui2::tmp_server_list>
+{
+	static gui2::tdialog* create()
+	{
+		return gui2::unit_test_mp_server_list();
+	}
+};
+
 template<>
 struct twrapper<gui2::ttransient_message>
 {