Apply the Fee Type from Settings in Purchase

[jjeffryes]

Settings/Advanced has a fee type which is saved to local storage, that type needs to be applied to the purchase.

Change the language to reflect the default, which is high, instead of suggesting average.

Consider showing the current estimated fee for each if possible.

[rmisio]

Settings/Advanced has a fee type which is saved to local storage, that type needs to be applied to the purchase.

If we update the spend() function in the wallet/Spend.js model as follows, then it would use the local storage fee type for any wallet spends (i.e. both from the Wallet and from Purchasing):

  const attrs = {
    currency: app && app.settings && app.settings.get('localCurrency') || 'BTC',
    feeLevel: app && app.localSettings && app.localSettings.get('defaultTransactionFee') || 'high', 
    memo: '', // this could be removed
    ...fields,
  };