Add a Lane context menu to hide/reveal cards in Deck #3101
Description
- I have checked that this feature has not yet been suggested by someone else.
Expected behavior
The idea is to make possible to hide/reveal some cards by using a context menu on a lane.
The context menu will be accessible through a "more" button on the right hand side of the lane header.
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Cuttings backs
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Potential side effects
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Describe alternatives you've considered
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