fix blindingly bright and wide background

Assets/Src/UI/Menu.uss

@@ -9,11 +9,11 @@
     height: 256px;
 }
 
-#left {
+/*#left {
     padding-left: 24px;
     padding-bottom: 24px;
 }
-
+*/
 Button {
     background-color: rgba(0, 0, 0, 0.26);
     color: rgb(255, 255, 255);
@@ -26,4 +26,9 @@ Button {
 
 #body {
     padding: 24px;
+    background-color: rgba(0, 0, 0, 0.62);
+}
+
+#right {
+    width: 100%;
 }