[mediaqueries-5][editorial] Added changes since level 4

Author: SebastianZ

mediaqueries-5/Overview.bs

@@ -3961,8 +3961,35 @@ The following additions were made to create the First Public Working Draft of th
 		'@media/prefers-color-scheme',
 		and '@media/forced-colors' media features.
 </ul>
+
+<h3 id="changes-L4">
+Changes Since Media Queries Level 4</h3>
+
+The following additions were made to this module since the <a href="https://www.w3.org/TR/mediaqueries-4/">Media Queries Level 4</a>:
+
+* Added '@media/environment-blending',
+	'@media/horizontal-viewport-segments',
+	'@media/vertical-viewport-segments',
+	'@media/display-mode',
+	'@media/dynamic-range',
+	'@media/inverted-colors',
+	'@media/nav-controls',
+	and '@media/scripting' [=media features=].
+* Added '@media/prefers-reduced-motion',
+	'@media/prefers-reduced-transparency',
+	'@media/prefers-contrast',
+	'@media/forced-colors',
+	'@media/prefers-color-scheme',
+	and '@media/prefers-reduced-data' <a href="#mf-user-preferences">User Preference Media Features</a>
+	including script control via the {{PreferenceManager}} interface and related {{Navigator/preferences}} attribute.
+* Added '@media/video-color-gamut'
+	and '@media/video-dynamic-range' <a href="#video-prefixed-features">Video Prefixed Features</a>.
+* Added <a href="#custom-mq">Custom Media Queries</a>.
+* Allowed media features to define their own values that evaluate to false.
+
 </div>
 
+
 <h2 class="no-num" id="acknowledgments">
 Acknowledgments</h2>