github.styl: Adjust ul/li background

sites/github.styl

@@ -588,14 +588,16 @@ a.label
         background-image linear-gradient(color-background-highlight, color-background) i
         border-color()
         color emphasized
+
 // ** tables
+
 .table-list
-    *
+    tr
+    li
         background-color()
 
         &:hover
-        &:hover *
+            background-color color-background-highlight-extra-less
-            background-color highlight
 
 .table-list-header
     background-color highlight