Manage order interface

Some comments:

nodeorder.routing.yml:

nodeorder.admin_order:
  /* ... */
  defaults:
    _controller: 

We can't use _entity_list in route, because we are displaying custom nodes list. Extending and modify contrib NodeListBuilder is a bad solution, here.

NodeOrderListBuilder.php:

  /**
   * {@inheritdoc}
   */
  protected function getEntityIds() {
    /* ... */

    return $this->nodesWeight ? array_keys($this->nodesWeight) : [-1];
  }

Method load will be triggered later, if we pass empty array as an argument, method will be load all entities with type node, will be passed -1 as an allowed ID for node to prevent loading all entities. Case for term without nodes.

Additional changes:

- Added custom access to route
- Rewrited few methods and functions
- Old form removed
- Added pager, to avoid problems with too many entities #2314945-9: Pager on node ordering display not needed
- Added columns: Type, Status, Operations