fix(Tinebase/Percent): allowDecimal config doesn´t work

Change-Id: Ic7afdb7a2351e4eb7e7bedaaa5403e9bb00e5809
Reviewed-on: http://gerrit.tine20.com/customers/18335
Tested-by: Jenkins CI (http://ci.tine20.com/) <tine20-jenkins@metaways.de>
Reviewed-by: Philipp Schüle <p.schuele@metaways.de>

tine20/Tinebase/js/ux/form/NumberField.js

@@ -88,7 +88,7 @@ Ext.ux.form.NumberField = Ext.extend(Ext.form.NumberField, {
             var decimalString = split[1];
         }
 
-        while (decimalString.length < this.decimalPrecision) {
+        while (this.allowDecimals && decimalString.length < this.decimalPrecision) {
             decimalString += '0';
         }