Better support for many nodes in one level

[neos-bot]

Jira issue originally created by user @bwaidelich:

Currently all nodes of one level are fetched at once (latest when the parent node is expanded). This leads to multiple issues when there are large amounts of nodes in one level:

Bad performance

Possible memory overflow

Limited searching/filtering possibilities

Nodes should be loaded lazily when exceeding a certain number (via pagination or "endless-scrolling" for example).

A more sophisticated search/filter would also be very useful (e.g. to filter nodes based on configurable properties)

Atachements:

Jira-URL: https://jira.neos.io/browse/NEOS-928

[neos-bot]

Comment created by @bwaidelich:

This is how I could imagine a "grouped" view (see NEOS-778)