[FIX] web: format value of statinfo widget

The value of the statinfo widget is rendered by the qweb after a t-esc.
Say if the python rounding returned 14.0000000001
(supposed to be a two digits precision number through the magic of floats)
then the statinfo widget would print it as-is.

We now format the value at assignation.

opw 1865426

addons/web/static/src/js/fields/basic_fields.js

@@ -1759,7 +1759,7 @@ var StatInfo = AbstractField.extend({
      */
     _render: function () {
         var options = {
-            value: this.value || 0,
+            value: this._formatValue(this.value || 0),
         };
         if (! this.attrs.nolabel) {
             if (this.nodeOptions.label_field && this.recordData[this.nodeOptions.label_field]) {