Ctrl + scroll wheel zoom no longer works (v0.28)

[Barugon]

Describe the bug
Event::Zoom is now never sent via Context::input for ctrl + scroll wheel.

To Reproduce
Steps to reproduce the behavior:

1. Implement Context:input and specifically look for Event::Zoom
2. Execute the app, hold the control key and spin the mouse-wheel
3. Note that Event::Zoom is never received

Desktop (please complete the following information):

• OS: Fedora
• Version: 40

[emilk]

This is actually expected behavior, though I forgot to mention it in the 0.28 migration guide (will fix!).

In #4524 I changed the behavior of ctrl-scroll to no longer emit Zoom events in the integration. Instead zooming is handled in egui:

egui/crates/egui/src/input_state.rs

Line 264 in 8bf498d

let is_zoom = modifiers.ctrl || modifiers.mac_cmd || modifiers.command;

As a user, you should use InputState::smooth_scroll_delta or InputState::raw_scroll_delta.