Clarify from_viewport_and_override logic

[Breakdown-Dog]

Objective

• This commit refactors the from_viewport_and_override function to improve readability and safety.

Solution

• Replaces the initial cloned() and subsequent if/else logic with a clearer if let structure.
• Removes the need for unwrap() by handling both Some and None cases

Testing

• I don't know how to make sure there is no probelm, but I run some examples and I don't see the errors.

[janis-bhm]

Getting rid of the unwrap() is definitely an improvement! Personally, I do think it could be made even clearer with unwrap_or_default and/or map_or_else on the override.