Replace Multiple Materials with a Single Replacement in Mass Changes

When using the Mass Changes tool, allow users to select multiple different materials and apply the same replacement material to all of them in a single step.

Why this would help:
Currently, if your project includes different materials (like corpuswit, frontwit, legboordwit, etc.) and you want to replace all of them with the same new material (like a specific wood grain), you need to assign that replacement one by one.

With this feature, you could:

• Select multiple materials/items at once
• Choose one replacement
• Apply it in a single action

This would save time and simplify material changes — especially useful when adapting projects to client preferences or color schemes.

Would this be useful for you?
Click the upvote button if this would improve your workflow. If you have any other thoughts or ideas around this, feel free to comment below.

- Dempsey (#17182)