Successfully built with llvm-19, imgui-1.90.6 and remove bug from std::move.

[jiapei100]

Type

• Bug fix (non-breaking change which fixes an issue): Fixes #
• New feature (non-breaking change which adds functionality). Resolves #
• Breaking change (fix or feature that would cause existing functionality to not work as expected) Resolves #

Motivation and Context

Checklist:

• I have run python util/check_style.py --apply to apply Open3D code style
  to my code.
• This PR changes Open3D behavior or adds new functionality.
  • Both C++ (Doxygen) and Python (Sphinx / Google style) documentation is
    updated accordingly.
  • I have added or updated C++ and / or Python unit tests OR included test
    results (e.g. screenshots or numbers) here.
• I will follow up and update the code if CI fails.
• For fork PRs, I have selected Allow edits from maintainers.

Description

[update-docs]

Thanks for submitting this pull request! The maintainers of this repository would appreciate if you could update the CHANGELOG.md based on your changes.

[ssheorey]

Hi @jiapei100 thanks for submitting this PR! Please describe the bug that you fixed, with a way to reproduce it in the current version. [Especially about std::move].

[ssheorey]

Hi @jiapei100 Thanks for the updates. Can you also:

• update 3rdparty/imgui/imgui.cmake to latest (1.90.6)
• Test visualization examples (especially all_widgets.py) on your computer and let us know the OS and hardware that you tested on.
• pip install clang-format~=10.0 and run make apply-style to fix the style.

[ssheorey]

Hi @jiapei100 with this change, it will not build with older llvm / libc++ versions. Why did you remove support for older LLVM versions?