Style for Tutorial Scrollbar

Platform/WebServer/css/tutorial.css

@@ -31,6 +31,22 @@ font-weight: bold;
     height: 78%;
 }
 
+::-webkit-scrollbar {
+    width: 10px;
+}
+
+::-webkit-scrollbar-track { 
+    background: #f1f1f1;
+}
+
+::-webkit-scrollbar-thumb {
+    background: #888;
+}
+
+::-webkit-scrollbar-thumb:hover {
+    background: #555;
+}
+
 .tutorial-definitionTable {
 background-color: #f3f3f3;
 border-top-color: #a6e1ec;