The selector .order-entries-item is used to get the text of the node to
find its order, so it needs to be set on the link as well.

Fixes #86

Picked from baa9c79

Inline script are bad, since it can lead to all sorts of nasty things.

Plus it makes CSP harder to configure safely.

A safer way is to use data-attributes to store/fetch values.

Fixes #83

Page::getContext does not always exists

- Database updated previousVersion
- Params need to respect parents when overrite

When the pagination is disabled or quite large, issuing a GET request
would return a 500 because the fieldid value could not be read by PHP,
since the url with all the parameters was too long.

Changing to a POST requet is a better option and can accept more data.

The setting always hid the field.

Fixes #78

Use new `Widget::Error` function and `InitialiseAdminPageHead` delegate

The new delegate is available since Symphony 2.4

`Widget::wrapFormElementWithError` has been removed in Symphony 2.4 according to the migration guide.

do not set a value for null filters

Version 2.3.1

There are no cute way to check if an index exists, so the simplest change is to ignore errors.
Fixes #73

fix order xml value

Version 2.3.0