SaveTool: move the tw macro so all SaveTool files can use it.

src/SaveTool/SaveTool.cpp

@@ -49,9 +49,6 @@
 extern const ImVec2 center_pivot = {0.5f, 0.5f};
 
 #ifdef SAVETOOL_DEBUG_BUILD
-#include <Corrade/Utility/Tweakable.h>
-
-#define tw CORRADE_TWEAKABLE
 Utility::Tweakable tweak;
 #endif
 

src/SaveTool/SaveTool.h

@@ -36,6 +36,12 @@
 #include "../MassManager/MassManager.h"
 #include "../ToastQueue/ToastQueue.h"
 
+#ifdef SAVETOOL_DEBUG_BUILD
+#include <Corrade/Utility/Tweakable.h>
+
+#define tw CORRADE_TWEAKABLE
+#endif
+
 using namespace Corrade;
 using namespace Magnum;