Fix Color description in Theme

Fix typo
Allow loading themes from file multiple times (e.g. for party modes)

Output/Themes/Ambient.xml

@@ -11,6 +11,6 @@
     <Skin>Cursor</Skin>
     <W>40,000</W>
     <H>40,000</H>
-    <Color>StaticColor</Color>
+    <Color><Name>StaticColor</Name></Color>
   </Cursor>
 </root>