Code clean in Tab.cpp and Fixed couple of Mac-warnings in :

GUI.cpp
GUI_App.cpp
GUI_ObjectList.cpp
MainFrame.hpp
Plater.cpp
PresetBundle.cpp
PresetHints.cpp
Tab.cpp
Tab.hpp
wxExtensions.cpp
wxExtensions.hpp

src/slic3r/GUI/GUI.cpp

@@ -262,7 +262,7 @@ void change_opt_value(DynamicPrintConfig& config, const t_config_option_key& opt
 	}
 	catch (const std::exception & /* e */)
 	{
-		int i = 0;//no reason, just experiment
+		// int i = 0;//no reason, just experiment
 	}
 }