* Most resource types now have unique identifiers.
* Applies to text, binary and imported resources.
* File formats reference both by text and UID (when available). UID always has priority.
* Resource UIDs are 64 bits for better compatibility with the engine.
* Can be represented and used textually, example `uuid://dapwmgsmnl28u`.
* A special binary cache file is used and exported, containing the mappings.
Example of how it looks:
```GDScript
[gd_scene load_steps=2 format=3 uid="uid://dw86wq31afig2"]
[ext_resource type="PackedScene" uid="uid://bt36ojelx8q6c" path="res://subscene.scn" id="1_t56hs"]
```
GDScript, shaders and other special resource files can't currently provide UIDs, but this should be doable with special keywords on the files.
This will be reserved for future PRs.
- Makes tips clearer and more consistent.
- Removes outdated "shift+v" that doesn't work
- Adds Ctrl+RMB for adding nodes at position
- Removes tip for non-existent Alt+Drag in 3D select tool
* Clean-up of node_3d_editor_plugin.{h,cpp}: removed unused code, fixed some bugs.
* Moved node_3d_editor_gizmos.{h,cpp} to editor/plugins.
* Added support for multiple gizmos per node. This means custom gizmos will no longer override the built-in ones and that multiple gizmos can be used in more complex nodes.
* Added support for handle IDs. When adding handles to a gizmo, an ID can be specified for each one, making it easier to work with gizmos that have a variable number of handles.
* Added support for subgizmos, selectable elements that can be transformed without needing a node of their own. By overriding _subgizmo_intersect_frustum() and/or _subgizmo_intersect_ray() gizmos can define which subgizmos should be selected on a region or click selection. Subgizmo transformations are applied using get/set/commit virtual methods, similar to how handles work.
The internal processing code only works for OS windows, since it takes
the mouse position relative to the window and not the viewport. Now we
make sure it's not called in single-window mode.
This pull request fixes an assortment of typos and improves conciseness in `Animation`, `Area2D`, `Array`, `ArrayMesh`, `Control`, `Directory`, `EditorPlugin`, `Engine`, and `OS`.
`localhost` was removed as it won't work out of the box. It can be added
by the user if they're working on the asset library itself.
This won't affect existing installations due to how the editor settings
are stored, but existing installations will keep working fine.
