[TRACKER] Animation UX Jank

### Tested versions

- Reproducable in Godot v4.5.dev.double

### System information

Godot v4.5.dev.double unknown - macOS Sequoia (15.5.0) - Multi-window, 1 monitor - Metal (Forward+) - integrated Apple M2 Pro (Apple8) - Apple M2 Pro (12 threads)

### Issue description

Listing all uncompleted issue/PRs for the animation ux inconveniences

- [ ] https://github.com/orgs/godotengine/projects/74/views/1

#### Animation Player

- [x] https://github.com/godotengine/godot/pull/92141
- [x] https://github.com/godotengine/godot/issues/101169
- [ ] https://github.com/godotengine/godot/issues/99836
- [ ] https://github.com/godotengine/godot-proposals/issues/1908

#### Animation Tree

- [ ] https://github.com/godotengine/godot/issues/99836

### Steps to reproduce

1. Use godot engine
2. ???
3. Jank

Feel free to edit the issue.

### Minimal reproduction project (MRP)

This is a tracker issue so this is not applicable.

Start by reviewing the linked Godot project board and the open issues and proposals listed under Animation Player and Animation Tree. This tracker has no specific files, tests, or reproducible steps; completion would require resolving or closing the listed animation UX inconveniences.

Written by the indexing model from the issue text.