[Feature Request]: Highlight invalid combo value

[huchenlei]

Is there an existing issue for this?

• [X] I have searched the existing issues and checked the recent builds/commits

What would your feature do ?

When loading a legacy workflow with legacy option values in it, it's hard to tell which combo box is having invalid value before execution.

Proposed workflow

When loading a workflow, invalid combo values should be highlighted

Additional information

Related PR: https://github.com/Comfy-Org/ComfyUI_frontend/pull/998