[selectors] Add issue about :-moz-ui-valid

Author: tabatkins

selectors/Overview.bs

@@ -2513,6 +2513,8 @@ The user-interaction pseudo-class '':user-error''</h4>
 		'':user-invalid'' and '':user-omitted'' could be used.
 -->
 
+	Issue: Look into :-moz-ui-valid as well.
+
 <h2 id="structural-pseudos">
 Tree-Structural pseudo-classes</h2>
 

selectors/Overview.html

@@ -2663,6 +2663,8 @@ <h4 class="heading settled heading" data-level=11.3.4 id=user-pseudos><span clas
 
 
 
+<p class=issue id=issue-48065f70><a class=self-link href=#issue-48065f70></a>	 Look into :-moz-ui-valid as well.
+
 <h2 class="heading settled heading" data-level=12 id=structural-pseudos><span class=secno>12 </span><span class=content>
 Tree-Structural pseudo-classes</span><a class=self-link href=#structural-pseudos></a></h2>
 
@@ -3743,6 +3745,8 @@ <h2 class="no-num heading settled" id=issues-index><span class=content>Issues In
 
 <a href=#issue-411b789d> ↵ </a></div><div class=issue>Any better name suggestions for this pseudo?
 
-<a href=#issue-907dd942> ↵ </a></div><div class=issue>	 Rewrite this whole danged thing in terms of Syntax parsing algos instead.
+<a href=#issue-907dd942> ↵ </a></div><div class=issue>	 Look into :-moz-ui-valid as well.
+
+<a href=#issue-48065f70> ↵ </a></div><div class=issue>	 Rewrite this whole danged thing in terms of Syntax parsing algos instead.
 
 <a href=#issue-240af3df> ↵ </a></div></div>