[css-cascade-4] Update Changes list

Author: fantasai

css-cascade-4/Overview.bs

@@ -1236,6 +1236,28 @@ Changes Since the 28 August 2018 Candidate Recommendation</h3>
 			Removed possibility of [=legacy name aliases=] to map subsets of the value space,
 			since they are simple name aliases.
 			(<a href="https://github.com/w3c/csswg-drafts/issues/4839">Issue 4839</a>)
+		<li id="change-2020-applies-to">
+			Gave concept of [=applies to=] its own section
+			and add some notes about implications.
+			(Issues <a href="https://github.com/w3c/csswg-drafts/issues/1861">1861</a>
+			and <a href="https://github.com/w3c/csswg-drafts/issues/5565">5565</a>)
+		<li id="change-2020-properties">
+			Defined the term [=property=].
+			(<a href="https://github.com/w3c/csswg-drafts/issues/5633">Issue 5633</a>)
+		<li id="change-2020-disconnected">
+			Defined value processing of elements that are not part of the tree.
+			(Issue <a href="https://github.com/w3c/csswg-drafts/issues/1964">1964</a> and <a href="https://github.com/w3c/csswg-drafts/issues/1548">1548</a>)
+			<blockquote>
+				<p><ins>Elements that are not [=connected=]
+				or are not part of the document’s [=flattened element tree=]
+				do not participate in CSS value processing,
+				and do not have [=declared=], [=cascaded=], [=specified=], [=computed=], [=used=], or [=actual=] values,
+				even if they potentially have style declarations assigned to them
+				(for example, by a <code>style</code> attribute).</ins></p>
+			</blockquote>
+		<li id="change-2020-origins">
+			Clarify origin comparison for quirks mode Content-Type assumptions.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/4838">Issue 4838</a>)
 	</ul>
 
 	Non-trivial changes since the <a href="https://www.w3.org/TR/2018/CR-css-cascade-4-20180828/">28 August 2018 Candidate Recommendation</a> include: