Remove error popup on query parameters

When defining a content view query filter, the editor will check if the number of '?' characters on the "query filter" part matches the number of "query parameters".

This prevents the user from saving if numbers do not match, which could be an issue when defining this content view on Studio side just to get a page provider (that will not hold the query parameters, as these need to be resolved in another context).

Let's change this check into an validation warning instead, and let the user save the configuration.