Increase the page size for array/dictionary editors to 20

[Calinou]

With smaller arrays/dictionaries, this makes it possible to view all of an array/dictionary's items on a single page.

Larger values could be used, but make switching between node selections quite slow, especially on low-end CPUs. They could also be problematic with complex resource inspectors for arrays/dictionaries that contain Resources.

The change is trivially cherry-pickable to 3.2 and has been tested there.

This closes godotengine/godot-proposals#2058.

[EricEzaM]

Why not an editor setting? I know they are a bit bloated atm but this seems like a good one to have actually.

[Calinou]

@EricEzaM I added a setting for it, which you can configure between 10 and 100 (defaults to 50).

The setting change applies when you select a node – no need to restart the editor.

[akien-mga]

I'm fine with making this configurable, but isn't 50 a lot? I'm not concerned about performance but about usability, if you have an exported array or dictionary and expand it, it will push all other node properties very far to the end of the scroll bar. I'm not sure that's better than the current experience to have a paged editor with 10 entries per page, which still lets you access other properties in the same/next "screen".

[akien-mga]

I'm fine with making this configurable, but isn't 50 a lot? I'm not concerned about performance but about usability, if you have an exported array or dictionary and expand it, it will push all other node properties very far to the end of the scroll bar. I'm not sure that's better than the current experience to have a paged editor with 10 entries per page, which still lets you access other properties in the same/next "screen".

Discussed it with @reduz, we agree that 20 would be a better default value.

If you need to edit arrays with more than 20 items, chances are that using the inspector is not the best workflow and it would be better to edit them nicely formatted in GDScript or have them serialized in JSON or ConfigFile resources.

[Calinou]

I've changed the default number of items per page to 20. It can still be increased up to 100 in the Editor Settings.

[akien-mga]

Thanks!

[akien-mga]

Cherry-picked for 3.2.4.