Replace DAP vars popup, instead of adding new (#7034)

helix-term/src/commands.rs

@@ -97,6 +97,13 @@ impl<'a> Context<'a> {
         }));
     }
 
+    /// Call `replace_or_push` on the Compositor
+    pub fn replace_or_push_layer<T: Component>(&mut self, id: &'static str, component: T) {
+        self.callback = Some(Box::new(move |compositor: &mut Compositor, _| {
+            compositor.replace_or_push(id, component);
+        }));
+    }
+
     #[inline]
     pub fn on_next_key(
         &mut self,

helix-term/src/commands/dap.rs

@@ -580,7 +580,7 @@ pub fn dap_variables(cx: &mut Context) {
 
     let contents = Text::from(tui::text::Text::from(variables));
     let popup = Popup::new("dap-variables", contents);
-    cx.push_layer(Box::new(popup));
+    cx.replace_or_push_layer("dap-variables", popup);
 }
 
 pub fn dap_terminate(cx: &mut Context) {