Allow Separate Inversion for Horizontal and Vertical Zoom in the Graph Editor

Problem :

• The "Invert Zoom Direction Mouse" option in Blender Navigation Preferences affects both horizontal and vertical zoom in the Graph Editor. However, some users (like me) want to invert only the vertical zoom while keeping the horizontal zoom unchanged.

Currently, there is no way to do this. If "Invert Zoom Direction Mouse" is enabled, both axes are affected.

Proposed Solution :

• Add separate toggles for "Invert Horizontal Zoom" and "Invert Vertical Zoom" in the Navigation Preferences.

Why It Matters :

• This would give users more precise control over zoom behavior in the Graph Editor, allowing them to customize it to fit their workflow without unwanted side effects.