Fix duplicate_names detection in projections.

Apply the requested changes.

Fix pylint error

Add code

Author: NejcDebevec

Orange/widgets/visualize/utils/widget.py

@@ -707,10 +707,16 @@ def _manual_move_finish(self, anchor_idx, x, y):
     def _get_projection_data(self):
         if self.data is None or self.projection is None:
             return None
+        proposed = [a.name for a in self.projection.domain.attributes]
+        names = get_unique_names(self.data.domain, proposed)
+
+        attributes = tuple([a.copy(name=n) for n, a in
+                            zip(names, self.projection.domain.attributes)]) \
+            if proposed != names else ()
         return self.data.transform(
             Domain(self.data.domain.attributes,
                    self.data.domain.class_vars,
-                   self.data.domain.metas + self.projection.domain.attributes))
+                   self.data.domain.metas + attributes))
 
     def commit(self):
         super().commit()