Ensure commas in numbers for legibility #130

[dkackman]

This PR introduces number localization for amount values. #130

• locale is whatever the navigator.language is
• formatting is deferred to number.toLocaleString
• Anywhere a value in xch or cat is displayed it should be localized
• it should respect walletState.sync.unit.decimals and 3 for CATS
• a couple of helper functions were introduced:
  • fromMojos used in a number of places instead of toDecimal to avoid number to string to number to string
  • formatNumber to wrap toLocaleString and handle type conversions
  • NumberFormat component for inclusion in markup

This same pattern can be used for DateTimes when the show up (#243)

[dkackman]

@BrandtH22 @Rigidity this is ready for review. I believe I did a thorough job of finding places where amounts should be formatted but I likely missed a spot or two.

[dkackman]

just did a merge form main. picked up an extra commit that i did not intend. low risk change to add more columns to the token grid on larger screens. 8a345ef