Display a confirmation upon enabling Flash
For #7470 (moved), we've made it really easy to enable flash. In fact, there are now at least three separate routes through the UI to do this that all accomplish the same thing, and none of them really convey to the user what they are getting themselves in to. We should find some way to attach an observer to the plugin controller that actually does this enabling, and display a confirmation dialog that asks the user if they really want to shoot themselves in the foot.
See also #8312 (closed).
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