Problem:
* Region rect was pretty much a hidden editor. Because it was annoying for it to pop up automatically, it did not.
* Because it did not, most users have no idea it even exists.
* But because it is a transient editor, it would steal focus of other editor and annoy users.
Solution:
* Editor has been moved to a window.
* Regions that can be edited add a button below the region which can be pressed to open the editor.
This required a slight change in EditorInspectorPlugin to allow custom editors to be below others.
* Add a button to add properties (which lets you select node and property)
* Add ability to drag properties and drop them to the editor.
* Made the editor transient (not always visible on the bottom) since its not needed most of the time.
* Added the ability to pin the editor, in case dragging properties from other nodes is desired.
This expands uppon #60708, using `get_node("%NodeName")` for nodes that
have a unique scene name to avoid having to change the onready
statements when the paths of the nodes change.
* Map is unnecessary and inefficient in almost every case.
* Replaced by the new HashMap.
* Renamed Map to RBMap and Set to RBSet for cases that still make sense
(order matters) but use is discouraged.
There were very few cases where replacing by HashMap was undesired because
keeping the key order was intended.
I tried to keep those (as RBMap) as much as possible, but might have missed
some. Review appreciated!
Adds a new, cleaned up, HashMap implementation.
* Uses Robin Hood Hashing (https://en.wikipedia.org/wiki/Hash_table#Robin_Hood_hashing).
* Keeps elements in a double linked list for simpler, ordered, iteration.
* Allows keeping iterators for later use in removal (Unlike Map<>, it does not do much
for performance vs keeping the key, but helps replace old code).
* Uses a more modern C++ iterator API, deprecates the old one.
* Supports custom allocator (in case there is a wish to use a paged one).
This class aims to unify all the associative template usage and replace it by this one:
* Map<> (whereas key order does not matter, which is 99% of cases)
* HashMap<>
* OrderedHashMap<>
* OAHashMap<>
and Skeleton3DEditorPlugin when used on foreign nodes.
Make gizmos visible upon creation rather than having to select
them first.
Make UV2 unwrapping and PhysicalBone creation properly subject
to UndoRedo.
