waveguides: fix PostOp selection

Waveguides/formulations.pro

@@ -400,13 +400,7 @@ PostOperation {
 }
 
 DefineConstant[
-  MyPostOp = {" Get_Field, Get_SParameters",
-    Choices{"Get_Field", "Get_FieldsBnd", "Get_SParameters"},
-    Name "Input/1Post-processing", MultipleSelection "101"}
-] ;
-
-DefineConstant[
-  R_ = {"Analysis", Name "GetDP/1ResolutionChoices", Visible 0}
-  C_ = {"-solve -pos -bin -v2", Name "GetDP/9ComputeCommand", Visible 0},
-  P_ = { Str[MyPostOp], Name "GetDP/2PostOperationChoices", Visible 0, ReadOnly 1}
+  R_ = {"Analysis", Name "GetDP/1ResolutionChoices", Visible 1}
+  C_ = {"-solve -pos -bin -v2", Name "GetDP/9ComputeCommand", Visible 1},
+  P_ = {"Get_Field, Get_SParameters", Choices{"Get_Field", "Get_FieldsBnd", "Get_SParameters"}, Name "GetDP/2PostOperationChoices", Visible 1}
 ] ;