Remove leading zeroes from send screen amount row input.

ui/app/components/send/currency-display.js

@@ -92,8 +92,12 @@ CurrencyDisplay.prototype.getConvertedValueToRender = function (nonFormattedValu
     : convertedValue
 }
 
+function removeLeadingZeroes (str) {
+  return str.replace(/^0*(?=\d)/, '')
+}
+
 CurrencyDisplay.prototype.handleChange = function (newVal) {
-  this.setState({ valueToRender: newVal })
+  this.setState({ valueToRender: removeLeadingZeroes(newVal) })
   this.props.onChange(this.getAmount(newVal))
 }