Sliders/scroll bars can't be dragged in native unfocusable windows

[gb2dev]

Tested versions

• Reproducible in: v4.3.stable.official [77dcf97]

System information

Windows 10 - v4.3.stable.official - Compatibility

Issue description

When you create a Window node with the "Unfocusable" and "Force Native" flags and put a Slider or ScrollContainer with ScrollBar in it, you can click the Slider/ScrollBar once to move it, but you can't drag it around.

Steps to reproduce

• Create a new Window node
• Check the Flags "Unfocusable" and "Force Native"
• Put a Slider node in it
• Run the project and try to drag the slider

Minimal reproduction project (MRP)

scrollbarunfocusable.zip

[tetrapod00]

Confirmed with the MRP on Windows 10. Seem like there are multiple issues with focus on Windows since 4.3. Possibly related to #95639 or #95577.