HackStudio: Show a backtrace in the debug information tab

Author: https://github.com/itamar8910
Commit: 1fb62df02a
Pull-request: https://github.com/SerenityOS/serenity/pull/2157
Reviewed-by: https://github.com/awesomekling

DevTools/HackStudio/Debugger/DebugInfoWidget.h

@@ -27,6 +27,7 @@
 #pragma once
 
 #include "Debugger.h"
+#include "LibGUI/ListView.h"
 #include <AK/NonnullOwnPtr.h>
 #include <LibGUI/Model.h>
 #include <LibGUI/Widget.h>
@@ -43,6 +44,6 @@ public:
 private:
     explicit DebugInfoWidget();
 
-    RefPtr<GUI::TreeView> m_info_view;
-    RefPtr<GUI::TableView> m_backtrace_view;
+    RefPtr<GUI::TreeView> m_variables_view;
+    RefPtr<GUI::ListView> m_backtrace_view;
 };