% swap numbers needs fixing

See the two pictures below. There is some problem here. I can type infinite number in the percentage. There are two problems here as far as I can see:

1. you can type any numbers to infinity.

   • This should be quite simple to fix (in theory). Just check your remove liquidity feature, where you can't type more than 100%.

2. you can type any decimals to infinity.

You might want to get a quick couple of prototype to see what looks best before embarking on the full solution. I'm happy to look at the quick prototype before you code it in testnet.