dock: Hide suffix action when tab_panel is collapsed (#963)

crates/ui/src/dock/tab_panel.rs

@@ -761,7 +761,8 @@ impl TabPanel {
                         ))
                     }),
             )
-            .suffix(
+            .when(!self.collapsed, |this| {
+                this.suffix(
                     h_flex()
                         .items_center()
                         .top_0()
@@ -780,6 +781,7 @@ impl TabPanel {
                         .child(self.render_toolbar(state, window, cx))
                         .when_some(right_dock_button, |this, btn| this.child(btn)),
                 )
+            })
             .into_any_element()
     }