[TASK] Make page fields to select configurable via configuration for …

[merzilla]

…TreeMenu

Add the possibility to provide a list of page fields to select for the TreeMenu by setting e.g.: pageFields = uid,pid,title,slug

• If the property is not set, it uses "*" for the select fields.
• If "*" is also in the list, it gets deleted from the list
• empty values wil be removed, so a type like "uid,,pid,title" is covered

The TreeMenu processor is a fast way to use it e.g. for an RESTful API. In order to create simpler API schemas it´s easier to define which fields are needed from pages. So the schema does not need to provide all ~100 fields if 5-6 are enough.

The change does not touch that nav_title, hasSubpages and subpages will be populated.

[achimfritz]

Hi @merzilla i think you should use the PopulatePageInformationEvent https://github.com/b13/menus/blob/main/Classes/Event/PopulatePageInformationEvent.php (to not bloat the code)