Noninteractive tooltip with any content (on_hover_ui)

[PPakalns]

When hover (tooltip) contains interactive widgets then mouse pointer can interact with the content of the tooltip, tooltip doesn't close when mouse leaves the original item that was hovered.

This causes issue when tooltip is used as only preview and shouldn't be interactable.

To get old behavior back the following workaround can be used:

if response.hovered() {
    response.show_tooltip_ui(|ui| {
        //  ....
    });
}

But this doesn't function very well because there is no delay before raising the tooltip. There is no handling of time when the scroll area was last scrolled etc. These features that are missing in workaround makes tooltip not flicker as much.

Describe the solution you'd like
Add a second on_hover_ui method or flag that can be used with tooltip that has interactive content, but shouldn't be interactable (when mouse leaves original item, tooltip closes instead of allowing to interact with the content of the tooltip)

[PPakalns]

Previous discussion:
#4793