[Feat] Unified controls across preview and the main viewport

[plstcfntstc]

Scope

Simply put:
MMB/RMB = Pans
Scroll wheel = Zooms

in both main viewport and preview.

Implementation Details

No response

Risks and Alternatives

Risk: You might end up not being confused.
Reward: You might end up not being confused!

References and Media

irrelevant.

Confirmation Checklist

• I have checked the existing issues for duplicates.
• I agree to follow this project's Code of Conduct.