Animation: Bezier curve editor: Vertical zoom with no-modifier Scroll (or Shift or Alt)

[hsandt]

Describe the project you are working on

A platformer

Describe the problem or limitation you are having in your project

It's super hard to guess that Ctrl+Alt+Scroll vertically zooms on the Animation Bezier curve editor (and there is no keyboard alternative nor Zoom to Fit, see #7547).

Others have been lost on this: https://www.reddit.com/r/godot/comments/wfqr2q/is_there_any_way_to_use_vertical_zoom_on_the/

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Ctrl+Scroll is used for Horizontal Zoom, but no-modifier Scroll, Shift+Scroll and Alt+Scroll are unused, so they should be the first candidates before entering the area of double-modifier input.

This could also be customisable in some special Editor Shortcut section for mouse actions, but that'd require more work. For now a hardcoded binding would be fine.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

a. Scroll to zoom vertically

or, if it really causes conflicts with scrolling other stuff (e.g. if we later support vertical scrolling for convenience instead of having to pan vertically, when curves stretch beyond the view area):

b. Shift+scroll to zoom vertically
c. Alt+scroll to zoom vertically (almost same as now, but without Ctrl)

If this enhancement will not be used often, can it be worked around with a few lines of script?

No

Is there a reason why this should be core and not an add-on in the asset library?

It's native binding to a native window