* Set result of calcTokenAmount to base 10 string in useTokenDisplayValue
* Use primaryCurrency for amount in transaction breakdownd details
* Hidden overflow and text overflow ellipsis on long primary currency in transaction-list-item
* Empty prefix for token approvals
* Conditional render primaryCurrency title in tx breakdown to `Spend limit amount` when tx is a token approve.
* Add title to primaryCurrency in tx list item to show full amount on hover
* Update ui/app/components/app/transaction-breakdown/transaction-breakdown.component.js
DRY title conditional rendering.
Co-authored-by: Mark Stacey <markjstacey@gmail.com>