Screensaver: Add app-screensaver.png 16x16 icon

Author: https://github.com/bcoles
Commit: https://github.com/SerenityOS/serenity/commit/548ecceb752
Pull-request: https://github.com/SerenityOS/serenity/pull/2060

Base/res/apps/Screensaver.af

@@ -2,3 +2,6 @@
 Name=Screensaver
 Executable=/bin/Screensaver
 Category=Demos
+
+[Icons]
+16x16=/res/icons/16x16/app-screensaver.png

Demos/Screensaver/Screensaver.cpp

@@ -146,7 +146,7 @@ int main(int argc, char** argv)
     screensaver_window.update();
 
     window->show();
-    window->set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/app-demo.png"));
+    window->set_icon(Gfx::Bitmap::load_from_file("/res/icons/16x16/app-screensaver.png"));
 
     return app.exec();
 }