Add a check item to Tracks menu for the scrolling beyond zero preference

src/ViewInfo.cpp

@@ -18,6 +18,7 @@ Paul Licameli
 #include "prefs/GUISettings.h"
 #include "Prefs.h"
 #include "xml/XMLWriter.h"
+#include "prefs/TracksPrefs.h"
 
 namespace {
 static const double gMaxZoom = 6000000;
@@ -133,7 +134,8 @@ void ViewInfo::UpdatePrefs()
 {
    ZoomInfo::UpdatePrefs();
 #ifdef EXPERIMENTAL_SCROLLING_LIMITS
-   gPrefs->Read(wxT("/GUI/ScrollBeyondZero"), &bScrollBeyondZero, false);
+   gPrefs->Read(TracksPrefs::ScrollingPreferenceKey(), &bScrollBeyondZero,
+                TracksPrefs::ScrollingPreferenceDefault());
 #endif
 
 }