Remove wx/{grid,font,ffile,colour,button,bmpbuttn}.h from headers

src/commands/AudacityCommand.h

@@ -17,7 +17,6 @@
 #include <set>
 
 #include "../MemoryX.h"
-#include <wx/bmpbuttn.h>
 #include <wx/defs.h>
 #include <wx/dynarray.h>
 #include <wx/intl.h>

src/commands/ScreenshotCommand.h

@@ -16,7 +16,8 @@
 #include "Command.h"
 #include "../commands/AudacityCommand.h"
 
-#include <wx/colour.h>
+#include <wx/colour.h> // member variable
+
 class wxWindow;
 class wxTopLevelWindow;
 class wxCommandEvent;