Support temporarely disabling code blocks from executing

[sezaru]

Sometimes I have code blocks where I'm testing stuff that takes some time to run but I don't need to run at that specific time (ex. The block is evaluating a model accuracy but I'm testing something else in another block) so what I'm end doing is adding a if false do ... end around that code block so if it is re-executed by Livebook, it will just pass right through it.

It would be great if we had that as a feature of Livebook itself where you have an option to disable that code block from being executed.

[jonatanklosko]

@sezaru what you can do is comment out all of the code in the cell with cmd+a cmd+/ (it works as a toggle, so you'd uncomment the same way). This should be straightforward and also makes it very clear the code is not executing :)