Scale manipulator does not scale rotated objects uniformly

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Godot version

4.0beta13

System information

Windows10, AMD Ryzen 9 3900XT, RTX3070, Vulkan

Issue description

I would expect when using the scale tool on an object with a scale of (1,1,1) without touching any of the handles to result in a uniform scale again (i.e. 0.1, 0.1, 0.1) and not one, where all components are different.
However, when the object has been rotated, this is the case no matter if using local or global transform.

This behavior was working properly in 3.x

Steps to reproduce

• Create an object (e.g. a CSGBox3D)
• Rotate it a little on different axes
• Scale it with the scale tool, without using any handle (uniform scale)
• Observe how the object is now slightly squashed or stretched, i.e. the scale components are not equal anymore

Minimal reproduction project

BrokenScale.zip

Observe how the cube turns into a pillar when using the Scale Manipulator.

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still valid in beta15

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Started bisecting the issue.
Issue did not appear in 4.0-dev.20211210, started appearing in 4.0-dev.20220105/.

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After bisecting up until 3 revisions, I am confident, that 6af77c7 introduced the bug.

[clayjohn]

CC @TokageItLab

[TokageItLab]

I have already know it is due to #53684. I'll take a look later.

[TokageItLab]

@ExquisiterEmil Okay, I sent #72362. Please test it if you can.

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@TokageItLab Works! Thank you! 👍