Added longer transfer history

[PureDimension]

Description

Currently, the frontend of copy-paste website records only two sent verification-code : the activating one and the previous one.

It would be cooler to have a longer transfer history.

Requirements

Check the sender at frontend (mainly src/pages/Sender.tsx I think), make it able to record more generated code, and it would be better to show them on the frontend when we have three valid verification-code or more.

About where to put it, I think create a drop-down menu is a viable solution, or any better visual solution would be welcome.

[PureDimension]

@rshdhere Could you please add some labels using your write permissions?