Autofill gasPrice for retry attempts with either the recommended gasprice or a %10 bump

[frankiebee]

fixes #5779

this will set the gasPrice on the txPrams to either be the recommended gas price or the %10 bump of the original which ever is higher

[metamaskbot]

Builds ready [05203c4]: mascara, chrome, firefox, edge, opera

[danjm]

Do we want to force the user to use our recommended gas price on retry?

What do you think about the following approach?

• if a user is ever setting the gas price to below our recommended minimum, we should show a warning
• if a user is retrying a transaction that had a gas price of 0, then we:
  • autofill gas price with our recommended gas price
  • still allow the user to set it as low as they wish
  • prevent them from sending a retry transaction with 0 gas price, and show an error message in that case
• if the original tx price was greater than 0, continue to force retries to be priced at 110% of the original tx price

[frankiebee]

@danjm this dosent force the user into it this is the method is still before the approval so they have a chance to change it but i can just do an autofill only for 0 thats a good idea too... dont want to rush merge this till the ui is also on the same page