Fix dock panel button tooltip not dismissed when state changes via keyboard shortcut (#44746)

Closes #44720

Release Notes:

- Fixed dock panel button tooltips not being dismissed when toggling
panels via keyboard shortcut




**Problem:** When hovering over a dock panel button and using a keyboard
shortcut to toggle the panel, the tooltip remains visible with stale
content. This is inconsistent with mouse click behavior, where the
tooltip is dismissed on mouse down.

**Solution:** Include the panel's active state in the button's element
ID. When the state changes, the element ID changes (e.g., `"DebugPanel"`
→ `"DebugPanel-active"`), which causes GPUI to discard the old element
state including the cached tooltip.

**Testing:** Manually verified:
1. Hover over a dock panel button, wait for tooltip
2. Press keyboard shortcut to toggle the panel
3. Tooltip is now dismissed (consistent with mouse click behavior)


https://github.com/user-attachments/assets/ed92fb6c-6c22-44e2-87e3-5461d35f7106

---------

Co-authored-by: MrSubidubi <finn@zed.dev>

crates/workspace/src/dock.rs

@@ -1037,7 +1037,9 @@ impl Render for PanelButtons {
                         .anchor(menu_anchor)
                         .attach(menu_attach)
                         .trigger(move |is_active, _window, _cx| {
-                            IconButton::new(name, icon)
+                            // Include active state in element ID to invalidate the cached
+                            // tooltip when panel state changes (e.g., via keyboard shortcut)
+                            IconButton::new((name, is_active_button as u64), icon)
                                 .icon_size(IconSize::Small)
                                 .toggle_state(is_active_button)
                                 .on_click({