**Feature Request**
Brief title for your desired feature:
Make "In BOM" so that user can toggle BOM visibility
How would you like the feature to work?
At present, once the `In BOM` box has been ticked, this option cannot be unticked: the only way to stop information appearing in the BOM is to edit the EasyEDA Source file.
Why is this feature important to you?
Users may want to choose which information is available for which parts. Maybe they want to show information for some parts in a schematic and not others.
Or maybe they want to clone a schematic to show to a custormer but hide all the BOM information.