Add Filament menu and add Filament/Retract settings to config store.

Marlin/ultralcd.h

@@ -118,6 +118,7 @@ char *ftostr3(const float &x);
 char *ftostr31ns(const float &x); // float to string without sign character
 char *ftostr31(const float &x);
 char *ftostr32(const float &x);
+char *ftostr43(const float &x);
 char *ftostr12ns(const float &x); 
 char *ftostr5(const float &x);
 char *ftostr51(const float &x);