STYLE: reduced usage of Switch

- Since 'bool' and 'Switch' use the _identical_ input mechanism
  (ie, both accept true/false, on/off, yes/no, none, 1/0), the main
  reason to prefer one or the other is the output.

  The output for Switch is as text (eg, "true"), whereas for bool
  it is label (0 or 1). If the output is required for a dictionary,
  Switch may be appropriate. If the output is not required, or is only
  used for Pstream exchange, bool can be more appropriate.

applications/utilities/mesh/manipulation/createBaffles/createBaffles.C

@@ -444,16 +444,16 @@ int main(int argc, char *argv[])
     const word dictName("createBafflesDict");
     #include "setSystemMeshDictionaryIO.H"
 
-    Switch internalFacesOnly(false);
+    bool internalFacesOnly(false);
 
-    Switch noFields(false);
+    bool noFields(false);
 
     PtrList<faceSelection> selectors;
     {
         Info<< "Reading baffle criteria from " << dictName << nl << endl;
         IOdictionary dict(dictIO);
 
-        dict.lookup("internalFacesOnly") >> internalFacesOnly;
+        internalFacesOnly = dict.get<bool>("internalFacesOnly");
         noFields = dict.lookupOrDefault("noFields", false);
 
         const dictionary& selectionsDict = dict.subDict("baffles");
@@ -717,10 +717,9 @@ int main(int argc, char *argv[])
                 // master and slave in different groupNames
                 // (ie 3D thermal baffles)
 
-                Switch sameGroup
-                (
-                    patchSource.lookupOrDefault("sameGroup", true)
-                );
+                const bool sameGroup =
+                    patchSource.lookupOrDefault("sameGroup", true);
+
                 if (!sameGroup)
                 {
                     groupNameMaster = groupName + "Group_master";
@@ -800,7 +799,6 @@ int main(int argc, char *argv[])
         }
 
 
-
         createFaces
         (
             internalFacesOnly,
@@ -897,10 +895,8 @@ int main(int argc, char *argv[])
             {
                 const dictionary& patchSource = dict.subDict("patchPairs");
 
-                Switch sameGroup
-                (
-                    patchSource.lookupOrDefault("sameGroup", true)
-                );
+                const bool sameGroup =
+                    patchSource.lookupOrDefault("sameGroup", true);
 
                 const word& groupName = selectors[selectorI].name();
 

applications/utilities/mesh/manipulation/createBaffles/faceSelection/faceSelection.H

@@ -41,7 +41,6 @@ SourceFiles
 #include "autoPtr.H"
 #include "boolList.H"
 #include "labelList.H"
-#include "Switch.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -71,7 +70,7 @@ protected:
         const dictionary dict_;
 
         //- Switch direction?
-        const Switch flip_;
+        const bool flip_;
 
 public: