Move/merge picture element dependencies into larger dependencies sect…

…ion (#466)

sections/infrastructure.include

@@ -1102,7 +1102,8 @@
 
   : Media Queries
   :: Implementations must support the Media Queries language. [[!MEDIAQ]]
-
+  :: <<media-condition>>
+
   : CSS modules
   :: While support for CSS as a whole is not required of implementations of this specification
       (though it is encouraged, at least for Web browsers), some features are defined in terms of
@@ -1180,9 +1181,9 @@
       * <a lt="consume a component value">Parse a comma-separated list of component values</a>
       * <a>component value</a>
       * <a>environment encoding</a>
-      * <a type lt="whitespace">&lt;whitespace-token></a>
+      * <<whitespace-token>>
 
-      The feature <a>&lt;length></a> is defined in the <cite>CSS Values and Units</cite>
+      The feature <<length>> is defined in the <cite>CSS Values and Units</cite>
       specification. [[!CSS-VALUES]]
 
       The term <a>CSS styling attribute</a> is defined in the <cite>CSS Style Attributes</cite>