Fix restore portal session option not working, close other notifications when showing a new one

include/WindowUtils.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <string>
+#include <X11/Xlib.h>
+
+namespace gsr {
+    enum class WindowCaptureType {
+        FOCUSED,
+        CURSOR
+    };
+
+    std::string get_focused_window_name(Display *dpy, WindowCaptureType window_capture_type);
+}