Visual affordance for controlling updates

[rfernand2]

Since one can have multiple cells, each doing visual updates, the resulting visual signals can at times be overwhelming, especially when trying to focus on a particular problem (like a code change). For times like these, it would be great to have some sort of visual affordance right along side (or part of) each visualization that would enable or disable updates. For example, it could be a checkbox labelled "update", that is checked by default. This gives the user complete control over what gets updated and when, without having to write extra code.

Some of the visualization have a "stop interactions" button - the right idea, but the button is one-way - there appears to be no way to re-enables updates (without rerunning the code).