Ability to edit multiple trades at once on create screen

Currently can only save or cancel when building a trade.

An ability to move to another strategy while this one is incomplete could be handy, allowing users to build two simultaneously rather than one at a time.

In fact possibly even a way to have two TP create screens side by side. Particularly for atm with my staggered entry workaround this would be handy.

Low Priority cos I can't imagine it being used all that often, but just wanted to do it and it's annoying that I've gotta either cancel or complete before I can touch another one.