Fix issue in CommonPostConfigurator
Fix issue in CommonPostConfigurator

Oops, I introduced a bug, sorry...
So... I reintroduce the last `if` condition (ie, `getCurrentPage() is 'index' or 'detail'`).
Because, `AbstractCrudController::renderFilters()` calls `...processFields()...` which calls the configurators (whose the CommonPostConfigurator).
And in the case of `renderFilters` action, the `getCurrentPage()` is null.
But in the case of `renderFilters` action, we must **not call** the `formatValueCallable` (because $value and $entity are null).

Well, it's not easy to explain, but I think that you see :-)
It's a pity to not be able to call the `formatValue` callables for custom actions.

So perhaps we have to test that condition? `
```php
if (false === \in_array($context->getCrud()->getCurrentPage(), [Crud::PAGE_NEW, Crud::PAGE_EDIT], true) && 'renderFilters' !== $context->getCrud()->getCurrentAction()) {
```

Thanks
javiereguiluz/EasyAdminBundle,javiereguiluz/EasyAdminBundle