make add scenario render new inputs in data prep app

[see24]

Won't save in same out folder if don't. But why? Should it be over writing any thing? maybe if you include the MAP etc in the second scenario

[see24]

Might be best to have the add scenario button before processing and then render a new section with just the required fields for the second scenario...l

[see24]

The problem was actually #84 but this would still be a good improvement

[see24]

Also need to check that close buttons and clearing of existing inputs in done correctly as was fixed in the ccvi app.

add improved close when exit browser function

Ideally parts that don't change between scenarios will come first, including clim_poly, then have scenario specific inputs separate, issue with this is some times things will change but other times they won't could have 1 url for 2 scenarios or could have different ones. Maybe it is a check box for the first scenario that says apply this field to all scenarios...