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; }