Add track filter preset for AnimationTree

[Daylily-Zeleen]

Describe the project you are working on

N/ A

Describe the problem or limitation you are having in your project

Currently, we should edit filter option for each AnimationNode, it is very easy to make mistake if the AnimationTree is complicated.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

We can save a filter setting as preset and load it when we need, instead of checking tracks many times.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

1. Create a resource class TrackFilterPreset to hold a HashMap<StringName, Vector<NodePath>> property, name it as presets.
2. Add track_preset as a property of AnimationTree.
3. Modify filter edit dialog to support function of create, modify, and load track preset.

If this enhancement will not be used often, can it be worked around with a few lines of script?

We can create a TrackFilterPreset resource without working with AnimationTree, and create a new AnimationTree Editor to support this feature. But obviously, to create an AnimationTree Editor is a heavy work.

Is there a reason why this should be core and not an add-on in the asset library?

Refer to above.