Fix tooltips not showing on IconButtons (#3427)

This PR fixes tooltips not showing on `IconButton`s.

The "fix" here is the same hack that we used to fix `on_click` handlers
for `ListItem`s, where we introduce another layer of wrapping with an
element with an ID set.

This PR also adds a story for the `IconButton` so this issue can be
tested/observed in isolation.

Release Notes:

- N/A

crates/storybook2/src/story_selector.rs

@@ -18,6 +18,7 @@ pub enum ComponentStory {
     ContextMenu,
     Focus,
     Icon,
+    IconButton,
     Input,
     Keybinding,
     Label,
@@ -37,6 +38,7 @@ impl ComponentStory {
             Self::ContextMenu => cx.build_view(|_| ui::ContextMenuStory).into(),
             Self::Focus => FocusStory::view(cx).into(),
             Self::Icon => cx.build_view(|_| ui::IconStory).into(),
+            Self::IconButton => cx.build_view(|_| ui::IconButtonStory).into(),
             Self::Input => cx.build_view(|_| ui::InputStory).into(),
             Self::Keybinding => cx.build_view(|_| ui::KeybindingStory).into(),
             Self::Label => cx.build_view(|_| ui::LabelStory).into(),