Make AnimationPlayer editor zoom on the current cursor position instead of the beginning of the track

[CookieBadger]

Describe the project you are working on

A 2D rythm-platformer (it's complicated)

Describe the problem or limitation you are having in your project

Currently, there are several issues, that constantly throw me and my colleagues off when using the Animation Player. I think it could use some usability improvements. One of them is the Zoom tool.

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

The Zoom tool (or CTRL+Mouse wheel) should zoom in on the current position, not the beginning of the track as it does right now. The current behavior is bad UX, any other timeline-based editing tool (animations, video, audio, etc.) zooms in on the cursor position, because that way you can zoom in onto the thing you are currently working on.

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

After zooming in one step (with the UI slider, or with the mouse wheel), move the scroll position, such that the cursor is centered.

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

This is used very often.

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

AnimationPlayer is core.

[akien-mga]

Implemented by godotengine/godot#85142