GS-GUI: Enable Software Edge-Aliasing by default

This will enable the checkbox for the software renderer, it has far more pros than cons (negligble performance hit)

pcsx2/GS/GS.cpp

@@ -1610,7 +1610,7 @@ void GSApp::Init()
 #else
 	m_default_configuration["linux_replay"]                               = "1";
 #endif
-	m_default_configuration["aa1"]                                        = "0";
+	m_default_configuration["aa1"]                                        = "1";
 	m_default_configuration["accurate_date"]                              = "1";
 	m_default_configuration["accurate_blending_unit"]                     = "1";
 	m_default_configuration["AspectRatio"]                                = "1";