Added Magic button and tweaked margins for Windows

src/web/stylesheets/layout/_controls.css

@@ -41,5 +41,5 @@
 }
 
 #controls .btn {
-    border-radius: 0;
+    border-radius: 30px;
 }

src/web/stylesheets/layout/_io.css

@@ -146,3 +146,8 @@
 
     transition: all 0.5s ease;
 }
+
+#magic {
+    margin-left: 5px;
+    display: none;
+}