[Feature Request] ArrayInput component that groups an arbitrary number of type-specific Input components

[webthethird]

See this comment on #288

I think it would be much better from a UI/UX perspective if we had an ArrayInput component, which would start with one AddressInput, BytesInput etc. (depending on paramType.type) next to a little + button that would add another of the same input type below the previous one. Then when you hit send, it would combine the values in all of the inputs into an array for you.

Besides looking nicer than surrounding the array with brackets and each element with quotes, it should also tap into the nice functionalities of each of the input type components, i.e., displaying an ENS avatar or blockie next to each address, allowing you to multiply each integer input by 10^18, checking for valid hex strings, etc.

It would be great to team up with someone to work on this, since I'm still new here and not the most experienced with UI/front-end development.