Fix AnimationTree AnimationPlayerEditor broken

[kitbdev]

• Fixes Animation references are broken in AnimationTree's AnimationLibraryEditor #117941

I assumed that this code that used to prevent the AnimationPlayerEditor from showing over the AnimationTreeEditor was fine, but it seems that something has changed since it was last used and now there are issues.

godot/editor/animation/animation_player_editor_plugin.cpp

Lines 2490 to 2491 in 220b0b2

	// if AnimationTree editor is visible, do not occupy the bottom panel
	if (AnimationTreeEditor::get_singleton() && AnimationTreeEditor::get_singleton()->is_visible_in_tree()) {

The logic in AnimationPlayerEditorPlugin::make_visible needs to run even if opening the AnimationTreeEditor over it, so I removed the check.
This also makes the AnimationPlayerEditor show if it is not in the same dock as the AnimationTreeEditor, which is now possible with some of the bottom dock reworks.
But then there needs to be a different way to make sure that the AnimationTreeEditor opens over it. (#115947)
So I changed the order in EditorData::get_handling_sub_editors.

The order of sub editor plugins (non main screen ones) was changed in #37022 as an addition to the main editor plugins, in order to give user plugins priority. But all sub editor plugins are edited, so to give users priority they should actually be edited after the default ones so they can show over them.
This change also makes plugins edit in the order they are added, the AnimationTreeEditor is added after the AnimationPlayerEditor, so it now shows over it.
Generally, I think more general plugins are added before more specific ones, so it should make sense to edit the more specific ones after.

I don't think any other sub editors edit the same object and care about order where this would be an issue.
Here are all plugins in the order that they are added to EditorData's editor_plugins in a default build. I'm still looking through it to see if there would be any issues from changing it to be in reverse order to forward order for non-main screens, but I haven't found any issues.

All EditorPlugins in order

1. DebuggerEditorPlugin does not handle any
2. CanvasItemEditorPlugin handles (main screen) CanvasItem
3. Node3DEditorPlugin handles (main screen) Node3D
4. ScriptEditorPlugin handles (main screen) Script || JSON || TextFile
5. GameViewPlugin (main screen) does not handle any
6. AssetLibraryEditorPlugin (main screen) does not handle any
7. AnimationPlayerEditorPlugin handles AnimationPlayer || AnimationTree || AnimationMixer
8. AnimationTrackKeyEditEditorPlugin handles AnimationTrackKeyEdit
9. AnimationMarkerKeyEditEditorPlugin handles AnimationMarkerKeyEdit
10. VersionControlEditorPlugin does not handle any
11. AudioBusesEditorPlugin handles AudioBusLayout
12. AnimationTreeEditorPlugin handles AnimationTree
13. AudioStreamEditorPlugin does not handle any
14. AudioStreamRandomizerEditorPlugin handles none
15. BitMapEditorPlugin does not handle any
16. BoneMapEditorPlugin does not handle any
17. Camera3DEditorPlugin handles Camera3D
18. ControlEditorPlugin handles Control
19. CPUParticles3DEditorPlugin handles CPUParticles3D (ParticlesEditorPlugin)
20. CurveEditorPlugin does not handle any
21. DebugAdapterServer does not handle any
22. EditorScriptPlugin does not handle any
23. FontEditorPlugin does not handle any
24. GPUParticles3DEditorPlugin handles GPUParticles3D (ParticlesEditorPlugin)
25. GPUParticlesCollisionSDF3DEditorPlugin handles GPUParticlesCollisionSDF3D
26. GradientEditorPlugin does not handle any
27. GradientTexture2DEditorPlugin does not handle any
28. InputEventEditorPlugin does not handle any
29. LightmapGIEditorPlugin handles LightmapGI
30. MarginContainerEditorPlugin handles MarginContainer
31. MaterialEditorPlugin does not handle any
32. MultiMeshEditorPlugin handles MultiMeshInstance3D
33. MeshInstance3DEditorPlugin handles MeshInstance3D || MultiNodeEdit with 2+ MeshInstance3D
34. MeshLibraryEditorPlugin handles MeshLibrary
35. MultiMeshEditorPlugin handles MultiMeshInstance3D
36. OccluderInstance3DEditorPlugin handles OccluderInstance3D
37. PackedSceneEditorPlugin does not handle any
38. Path3DEditorPlugin handles Path3D
39. PhysicalBone3DEditorPlugin does not handle any
40. Polygon3DEditorPlugin handles Node3D && bool(p_object->call("_is_editable_3d_polygon"))
41. ResourcePreloaderEditorPlugin handles ResourcePreloader
42. ShaderEditorPlugin handles Shader || ShaderInclude
43. ShaderFileEditorPlugin handles RDShaderFile
44. Skeleton3DEditorPlugin handles Skeleton3D
45. SpriteFramesEditorPlugin handles AnimatedSprite2D with get_sprite_frames() || AnimatedSprite3D with get_sprite_frames() || SpriteFrames if currently editing those frames or not editing any.
46. StyleBoxEditorPlugin does not handle any
47. SubViewportPreviewEditorPlugin does not handle any
48. Texture3DEditorPlugin does not handle any
49. TextureEditorPlugin does not handle any
50. TextureLayeredEditorPlugin does not handle any
51. TextureRegionEditorPlugin does not handle any
52. ThemeEditorPlugin handles Theme
53. ToolButtonEditorPlugin does not handle any
54. VirtualJoystickEditorPlugin handles VirtualJoystick
55. VoxelGIEditorPlugin handles VoxelGI
56. SkeletonIK3DEditorPlugin handles SkeletonIK3D
57. Camera2DEditorPlugin handles Camera2D
58. CollisionPolygon2DEditorPlugin handles CollisionPolygon2D (AbstractPolygon2DEditorPlugin)
59. CollisionShape2DEditorPlugin handles CollisionShape2D
60. CPUParticles2DEditorPlugin handles CPUParticles2D (ParticlesEditorPlugin)
61. GPUParticles2DEditorPlugin handles GPUParticles2D (ParticlesEditorPlugin)
62. LightOccluder2DEditorPlugin handles LightOccluder2D (AbstractPolygon2DEditorPlugin)
63. Line2DEditorPlugin handles Line2D (AbstractPolygon2DEditorPlugin)
64. Path2DEditorPlugin handles Path2D
65. Polygon2DEditorPlugin handles Polygon2D (AbstractPolygon2DEditorPlugin)
66. Cast2DEditorPlugin handles RayCast2D || ShapeCast2D
67. Skeleton2DEditorPlugin handles Skeleton2D
68. Sprite2DEditorPlugin handles Sprite2D
69. TileSetEditorPlugin handles TileSet
70. TileMapEditorPlugin handles TileMapLayer || TileMap || MultiNodeEdit with all TileMapLayers
71. ScenePaint2DEditorPlugin handles Node2D
72. ParallaxBackgroundEditorPlugin handles ParallaxBackground
73. EditorPluginCSG handles CSGShape3D && csg_shape->is_root_shape()
74. GDScriptLanguageServer does not handle any
75. SceneExporterGLTFPlugin does not handle any
76. GridMapEditorPlugin handles GridMap
77. AudioStreamInteractiveEditorPlugin does not handle any
78. MultiplayerEditorPlugin handles MultiplayerSynchronizer
79. NavigationLink2DEditorPlugin handles NavigationLink2D
80. NavigationRegion2DEditorPlugin handles NavigationRegion2D (AbstractPolygon2DEditorPlugin)
81. NavigationObstacle2DEditorPlugin handles NavigationObstacle2D (AbstractPolygon2DEditorPlugin)
82. NavigationLink3DEditorPlugin handles NavigationLink3D
83. NavigationRegion3DEditorPlugin handles NavigationRegion3D || MultiNodeEdit with any NavigationRegion3D
84. NavigationObstacle3DEditorPlugin handles NavigationObstacle3D
85. NoiseEditorPlugin does not handle any
86. ObjectDBProfilerPlugin does not handle any
87. OpenXREditorPlugin handles OpenXRActionMap && action_map_editor
88. User plugins go here

[TokageItLab]

Confirmed this fixes the issue.

[Repiteo]

Thanks!