Polishing v3 pool creator

[MattPereira]

• Figure out successful pool initialization end state
• Figure out strategy for setting minBptAmountOut on pool init
• If more than 2 tokens, allow user to remove a token
• Figure out strategy for user potentially network switching during pool config and/or tx steps
• Figure out permit2 for pool init to reduce # of txs required
• Warning if users joining with token amounts that deviate from weights?
• Ability to resume some way through the transaction flow?
• Auto fill rate provider using data from API
• Warn if user enters rate provider that hasnt been reviewed
• Figure out weight locking similar to beethoven
• Test pool creation with tokens that have rate provider
• Explore preset options feature similar to curve (would be good for hooks)
• Decide if state should be kept in local storage or if it's better to let it reset on page refresh
• Improve / add more input validations
• Improve pool preview
• Improve styles

[MattPereira]

• Show user list of unfinished pools in case of disconnect during step 1
  • Look up via pool factory events