[css-inline] Add issue

Author: fantasai

css-inline/Overview.bs

@@ -736,6 +736,8 @@ and to use this as a fallback for glyph detection if necessary.
 	</pre>
 </div>
 
+Issue: These values and related annoyance is likely unnecessary if someone submits a patch to Blink to support ''first''.
+
 </dl>
 
 Issue: Edit figure to show how auto behaves in varying contexts