Add note to move text-size-adjust to simple alias (when unprefixable).

compatibility.bs

@@ -453,8 +453,6 @@ The following <code>-webkit-</code> <a>vendor prefixed</a> properties must be su
 
 The following <code>-webkit-</code> <a>vendor prefixed</a> properties must be supported as aliases of the corresponding unprefixed properties. If the user agent does not ship the unprefixed equivalent, the <code>-webkit-</code> prefixed property must be treated as an alias of the user agent's own vendor prefixed property.
 
-<!-- Yeah, this is kind of weird. As soon as https://drafts.csswg.org/css-size-adjust/#text-size-adjust is unprefixable it can be moved to be a "simple" alias -->
-
 <table>
   <thead>
     <tr>
@@ -470,6 +468,9 @@ The following <code>-webkit-</code> <a>vendor prefixed</a> properties must be su
   </tbody>
 </table>
 
+<br>
+<div class="note"> As soon as https://drafts.csswg.org/css-size-adjust/#text-size-adjust is unprefixable it can be defined as a "simple" alias.</div>
+
 <h4 id="css-property-mappings">Property mappings</h4>
 
 The following <code>-webkit-</code> <a>vendor prefixed</a> properties must be supported as mappings to the corresponding unprefixed property:

compatibility.html

@@ -753,6 +753,11 @@ <h4 class="heading settled" data-level="3.4.2" id="css-prefixed-aliases"><span c
 </table>
 
 
+   <p><br></p>
+
+   <div class="note" role="note"> As soon as https://drafts.csswg.org/css-size-adjust/#text-size-adjust is unprefixable it can be defined as a "simple" alias.</div>
+
+
    <h4 class="heading settled" data-level="3.4.3" id="css-property-mappings"><span class="secno">3.4.3. </span><span class="content">Property mappings</span><a class="self-link" href="#css-property-mappings"></a></h4>