Removed background-color for config lists.

Background colors for unordered list in options were set to match body.
This created a problem during and after the space game when the body and
text were inverted, but the ul was not. See Issue #432.

Tried this via Chrome's dev tools while at the effected screen in dark
theme, and it seemed to work.

css/dark.css

@@ -3,10 +3,6 @@ body {
 	color: #EEE;
 }
 
-.customSelectOptions > ul {
-	background-color: #272823;
-}
-
 div.headerButton {
 	border-left: 1px solid #EEE;
 }

css/main.css

@@ -97,7 +97,6 @@ span.customSelectOptions {
 	bottom: 0;
 	position: absolute;
 	right: 0;
-	background-color: white;
 }
 
 .customSelectOptions > ul:hover {