Fix Container sorting not working when overriding _sort_children in gdscript

Fix editor ignoring 'single_window_mode' with no main scene

Add SCons option to not build C# solutions

Previously the editor would ignore the 'single_window_mode' editor setting if
the edited project didn't have a main scene configured in the project settings.

Block WM_MOUSEMOVE during Windows Ink pen handling.

xatlas: Sync with upstream 470576d

Expose `Image.save_png_to_buffer` method

Fix moving 2D node with mouse after using arrow keys

Mono/C#: Don't try to load project assembly in project manager

Fix condition in ClassDB tests that should return

Mono/C#: Fix values not updated in remote inspector

Clarifies 'icon_separation' in TabContainer (instead of 'hseparation')

Fix segmentation fault when loading project

This was causing an error message when launching the manager,
because there is no project assembly to load.

Also changed the name of the test macros to be clearer.

Fixes: #38911

Fixes: #38894

Docs: Fix order of variant constants.

Trigger an error when trying to define a preexisting signal in GDScript

Fix false positive "Unreachable code" warning for loops

Delete DummyMesh when RasterizerStorageDummy is Freed

The missing `operator<` definitions caused `Vector::sort()` to fail
sorting those alphabetically by name on Windows (not sure why Linux
isn't affected, I guess GCC/Clang are cleverer and use the operator
from the first struct member).

Fix error with 'params' when import dock doesn't define any parameter

[Windows] Add tablet driver selection.

TextEdit search returns Dictionary instead of Vector

Allow `.res` and `.tres` extensions in the scene CLI positional argument

Fix Android LineEdit editing bugs

Keep "lock" metadata when changing a Node's type, if applicable