Fix AttributeError in DataFrameView.moveCursor

Fix #78

Author: PierreRaybaut

guidata/widgets/dataframeeditor.py

@@ -608,7 +608,7 @@ def moveCursor(self, cursor_action, modifiers):
         ) + self.frozen_table_view.columnWidth(1)
         topleft_x = self.visualRect(current).topLeft().x()
 
-        overflow = self.MoveLeft and current.column() > 1
+        overflow = cursor_action.MoveLeft and current.column() > 1
         overflow = overflow and topleft_x < col_width
 
         if cursor_action == overflow: