And dark demo

Author: linev

demo/examples_more.json

@@ -224,6 +224,7 @@
      { "name": "diamond", "file": "tutorials_graphics.root", "item": "diamond",  "title": "TDiamond, tutorials/graphics/diamond.C" },
      { "name": "crown", "file": "tutorials_graphics.root", "item": "crown",  "title": "TCrown, tutorials/graphics/crown.C" },
      { "name": "zstd", "file": "zstd.root", "item": "ccdb_object", "zstd": true, "title": "File with ZSTD compression, required zstd-codec.js script" },
-     { "name": "pave", "file": "tpavetext.root", "item": "ccdb_object", "title": "Drawing of plain TPaveText with TLine and custom text lines alignment" }
+     { "name": "pave", "file": "tpavetext.root", "item": "ccdb_object", "title": "Drawing of plain TPaveText with TLine and custom text lines alignment" },
+     { "name": "dark", "opt": "dark", "file": "hsimple.root", "item": "hpx;1", "title": "Invert colors of histogram drawin, same as settings.DarkMode = true" }
    ]
 }