Fix #3756: Convert values to float for number formatting

Convert string values to floating point, so that `number_format` method can properly format values.

framework/base/Formatter.php

@@ -436,7 +436,7 @@ class Formatter extends Component
         $ds = isset($this->decimalSeparator) ? $this->decimalSeparator : '.';
         $ts = isset($this->thousandSeparator) ? $this->thousandSeparator : ',';
 
-        return number_format($value, $decimals, $ds, $ts);
+        return number_format((float) $value, $decimals, $ds, $ts);
     }
 
     /**