My plot

First fix my break point list to hold the associated line of code.
Then,  when a new file is loaded, then the user puts up his watch list and break list, as done now.  But when he hits the run button, the run inserts all the break calls, and submits the entire source to eval. Submitted from the start.

From then on, the only action in break halt is display the watch list and wait for the user to request run, again.  At The point, break halt gets the message and simply returns to eval.next run click.  On the next run click, it returns.  Break call is only called by eval.

I have to hassle with the list of break point saved lines, but after that is ids just fool the system into maintaining the context.  Adds two days, the bosses likely planned for this anyway.