Bug 1091648 - Follow up 1089829 - [Usage] Show a note to notice user wha...

...t are the format constrains for data limit
The function `isValidValue()` should look like:
```javascript
function isValidValue(newValue) {
  var containsNonValidCharacters = [',','-'].some(c => newValue.indexOf(c) > -1);
  var containsMoreThanOneDot = (newValue.match(/\./g) || []).length;
  return Number.isNaN(newValue &&
            !containsNonValidCharacters && !containsMoreThanOneDot &&
            isValidFormat(newValue);
}
```