title: Enter a currency value into Vaadin TextField with comma as decimal separator
body: <p>I use a simple <code>TextField</code> to enter a currency value and i want to transfer it to a <code>BigDecimal</code>. Now I want to enter values like "145,53" (comma separated decimals, as an usual currency value for €). But it only accepts the value if I use "145.53". </p>
  
  <p>How can i apply this in a correct way?</p>