Update trade complete screen

[twblack88]

A little polish on this screen will go a long way to more volume and a better experience.

• render a checkmark, draw the check animation by beard
• change to trade summary (instead of show details)

new modal here

Follow on ticket

• add fox savings/could have saved.  #8028

[0xean]

@reallybeard will make the animated check

[NeOMakinG]

We need to get it back, it's been removed with the new trade flow, make it great again with it!