[css-overflow-3] Update changes list

Author: fantasai

css-overflow-3/Overview.bs

@@ -1663,8 +1663,20 @@ Fragmentation of Overflow: the 'continue' property</h3>
 Changes from the <a href="https://www.w3.org/TR/2020/WD-css-overflow-3-20200603/">2020-06-03 Working Draft</a></h3>
 
 	* Moved the 'scroll-behavior' property from [[CSSOM-VIEW]] to this specification.
-	* Adopt the 'scrollbar-gutter' property, previously defined in [[CSS-OVERFLOW-4]].
-	<!-- This list is not complete -->
+	* Adopted the 'scrollbar-gutter' property, previously defined in [[CSS-OVERFLOW-4]].
+	* Added box-edge keywords to 'overflow-clip-margin'.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/5801">Issue 5801</a>)
+	* Clarified interaction of 'border-radius' and 'overflow-clip-margin'.
+	* Added note about user scrolling gestures vs. transforms.
+	* Tightened up requirements around incorporating margins, padding, and zero-area boxes into the [=scrollable overflow area=].
+		(<a href="https://github.com/w3c/csswg-drafts/issues/129">Issue 129</a>,
+		<a href="https://github.com/w3c/csswg-drafts/issues/4791">Issue 4791</a>)
+	* More precisely defined impact of scrollbars on layout.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/3348">Issue 3348</a>)
+	* Handle various edge cases involving 'overflow' propagation to the viewport.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/3779">Issue 3779</a>,
+		<a href="https://github.com/w3c/csswg-drafts/issues/5913">Issue 5913</a>)
+	* Miscellaneous small clarifications and fixes.
 
 <h3 id="changes-since-2018-07-31">
 Changes from the <a href="https://www.w3.org/TR/2018/WD-css-overflow-3-20180731/">2018-07-31 Working Draft</a></h3>