Warning when stopping or closing rendering

"I have a suggestion for a program modification if its possible.  When I am rendering and I hit the change settings button it brings up an error message.  On the other hand, if I hit the stop button once, there is sometimes a lag before the computer will acknowledge that you have asked it to stop after the current pass is complete.  I often make the mistake of assuming my first click didn’t register and hit it again, stopping mid pass.  Likewise, I just spent 2 hours rendering 2 passes on a model and accidently clicked the X on the wrong window and closed my IRender program, losing all my work. 

It would be nice if there was a “Are you sure you want to Close/Stop Rendering?” prompt before completing these commands.

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