Fix various (doxy) typos and whitespace issues

Found via `codespell -q 3 -L aci,ake,aline,alle,alledges,alocation,als,ang,anid,ba,beginn,behaviour,bloaded,byteorder,calculater,cancelled,cancelling,cas,cascade,centimetre,childs,colour,colours,commen,currenty,dof,doubleclick,dum,eiter,elemente,feld,freez,hist,iff,indicies,initialisation,initialise,initialised,initialises,initialisiert,ist,kilometre,lod,mantatory,methode,metres,millimetre,modell,nd,noe,normale,normaly,nto,numer,oder,orgin,orginx,orginy,ot,pard,pres,programm,que,recurrance,rougly,seperator,serie,sinc,strack,substraction,te,thist,thru,tread,uint,unter,vertexes,wallthickness,whitespaces -S ./.git,*.po,*.ts,./ChangeLog.txt,./src/3rdParty,./src/Mod/Assembly/App/opendcm,./src/CXX,./src/zipios++,./src/Base/swig*,./src/Mod/Robot/App/kdl_cp,./src/Mod/Import/App/SCL,./src/WindowsInstaller,./src/Doc/FreeCAD.uml`

src/Mod/PartDesign/App/FeatureDressUp.h

@@ -56,7 +56,7 @@ public:
      */
     virtual Part::Feature* getBaseObject(bool silent=false) const;
     /// extracts all edges from the subshapes (including face edges) and furthermore adds
-    /// all C0 continuos edges to the vector
+    /// all C0 continuous edges to the vector
     void getContiniusEdges(Part::TopoShape, std::vector< std::string >&);
 
 protected:

src/Mod/PartDesign/App/FeatureTransformed.h

@@ -83,7 +83,7 @@ public:
     //@}
 
     /** returns a list of the transformations that where rejected during the last execute
-      * because they did not ovelap with the support
+      * because they did not overlap with the support
       */
     typedef std::map<App::DocumentObject*, std::list<gp_Trsf> > rejectedMap;
     const rejectedMap getRejectedTransformations(void) { return rejected; }

src/Mod/PartDesign/Gui/Command.cpp

@@ -1939,7 +1939,7 @@ void prepareTransformed(PartDesign::Body *pcActiveBody, Gui::Command* cmd, const
 
         auto Feat = pcActiveBody->getDocument()->getObject(FeatName.c_str());
 
-        // TODO Wjat that function supposed to do? (2015-08-05, Fat-Zer)
+        // TODO What is this function supposed to do? (2015-08-05, Fat-Zer)
         func(Feat, features);
 
         // Set the tip of the body

src/Mod/PartDesign/Gui/ReferenceSelection.cpp

@@ -212,7 +212,7 @@ void getReferencedSelection(const App::DocumentObject* thisObj, const Gui::Selec
     
     //check if the selection is an external reference and ask the user what to do
     //of course only if thisObj is in a body, as otherwise the old workflow would not 
-    //be supportet
+    //be supported
     PartDesign::Body* body = PartDesignGui::getBodyFor(thisObj, false);
     bool originfeature = selObj->isDerivedFrom(App::OriginFeature::getClassTypeId());
     if (!originfeature && body) {

src/Mod/PartDesign/Gui/WorkflowManager.h

@@ -44,7 +44,7 @@ enum class Workflow {
 
 /**
  * This class controls the workflow of each file.
- * It has been introdused to support legacy files migrating to the new workflow.
+ * It has been introduced to support legacy files migrating to the new workflow.
  */
 class PartDesignGuiExport WorkflowManager {
 public: