Script the images for Tracks page of manual.

- There's a problem with stem plot preference.  It isn't reloading properly from batch but is from menu.

src/commands/ScreenshotCommand.cpp

@@ -104,7 +104,7 @@ static const wxString kCaptureWhatStrings[nCaptureWhats] =
    XO("Ruler"),
    XO("Tracks"),
    XO("First_Track"),
-   XO("Second_Track")
+   XO("Second_Track"),
    XO("Tracks_Plus"),
    XO("First_Track_Plus"),
 };

src/commands/ScriptCommandRelay.cpp

@@ -89,7 +89,7 @@ int ExecCommand(wxString *pIn, wxString *pOut)
    wxString msg = ScriptCommandRelay::ReceiveResponse().GetMessage();
    while (msg != wxT("\n"))
    {
-      wxLogDebug( "Msg: %s", msg );
+      //wxLogDebug( "Msg: %s", msg );
       *pOut += msg + wxT("\n");
       msg = ScriptCommandRelay::ReceiveResponse().GetMessage();
    }