Make DraftGeomUtils.findWires use Part.sortEdges

Renamed the original DraftGeomUtils.findWires() to findWiresOld2(). The
original findWires() has a bug which may cause missing edge(s).
Besides, using C++ implementation of Part.sortEdges will have better
performance.

src/Mod/Draft/DraftGeomUtils.py

@@ -870,8 +870,10 @@ def flattenWire(wire):
     w = Part.makePolygon(verts)
     return w
 
-
 def findWires(edgeslist):
+    return [ Part.Wire(e) for e in Part.sortEdges(edgeslist)]
+    
+def findWiresOld2(edgeslist):
     '''finds connected wires in the given list of edges'''
 
     def touches(e1,e2):