Removes custom_multiplayer from Node.
MultiplayerAPI overrides are now set at SceneTree level, and apply to
whole branches.
Impact on performance when using only the default multiplayer or
overriding it is minimal, the use of branches can likely be further
optimized by caching nodes and relevant MultiplayerAPI IDs.
The new name contrasts it better with `find_parent`, and makes it clear
that it only matches child/descendant nodes.
Also rename `find_nodes` to `find_children` accordingly.
Implements https://github.com/godotengine/godot-proposals/issues/4096
* Nodes can be marked unique to the scene in the editor (or via code).
* Unique nodes can be accessed via the **%** prefix at any point in the path. From that point in the path (depending on whether the scene of the path is), the unique node will be fetched.
* Implementation is very optimal, as these nodes are cached.
Fixed line_drawing_cache not containing anything
Fixed is_move_caret_on_right_click_enabled requiring the context menu to be enabled
Fixed when selecting_enabled is false not disabling shift + click
Fixed when selecting_enabled is false not being able to drag the caret
Fixed _delete emitting signals when nothing had changed.
Fixed insert_line_at up causing a visual update
Fixed get_pos_at_line_column returning a valid position when it was invalid
Fixed set_caret_column unnecessary emitting "caret_changed" when the column is greater then the line
Fixed select_word_under_caret not accepting the edges of words
Fixed select_word_under_caret moving the caret to the start of the line when no word was found
Fixed get_selection_line and get_selection_column not checking if the selection was enabled
Fixed set_line_as_center_visible throwing errors if it would show line 0
Fixed set_line_as_center_visible being off by one
Fixed set_line_as_last_visible not being able to show the first line
Fixed pressing UP and the end of a wrapped line sending the caret to col 0 rather then then persevering the position.
Add "generate_mipmap" font import option.
Add some missing features to the Sprite3D.
Move BiDi override code from Control to TextServer.
Add functions to access TextServer font cache textures.
Add MSDF related flags and shader to the standard material.
Change standard material cache to use HashMap instead of Vector.
Zero or negative ratios are not valid, so the property hint prevents
choosing such values.
The property hint allows using 4 decimals so that common aspect ratios
like 16/9 can be specified with a good level of precision.
