[css-scrollbars-1][editorial] Fixed Bikeshed issues and updated WPTs

Author: SebastianZ

css-scrollbars-1/Overview.bs

@@ -24,6 +24,10 @@ Abstract: This CSS module defines properties
 WPT Path Prefix: css/css-scrollbars/
 </pre>
 
+<pre class=link-defaults>
+spec:html; type:element; text:body
+</pre>
+
 <h2 id="intro">
 Introduction</h2>
 
@@ -59,6 +63,7 @@ Scope</h3>
 
 	<wpt title="Tests that related to the specification as a whole, without exerting any specific part">
 		invalid-needs-layout-crash.html
+		scrollbar-after-remove-resize.html
 	</wpt>
 
 <h4 id="out-of-scope">
@@ -173,7 +178,7 @@ Value Definitions</h3>
 	</wpt>
 
 	Note: Unlike 'overflow' (and overflow-*) properties,
-	scrollbar-color value set on the HTML body element are not propagated to the viewport.
+	scrollbar-color value set on the HTML <{body}> element are not propagated to the viewport.
 
 	<wpt>
 		viewport-scrollbar-body.html
@@ -263,7 +268,7 @@ Value Definitions</h3>
 		the light gray [=track=] has a darker outline.
 		This design also happens to include [=buttons=].
 
-		<img src="images/non-flat-bar.png"
+		<img src="images/non-flat-bar.png" width=318 height=17
 			alt="A horizontal scrollbar with a textured, shaded and outlined blue thumb,
 			over a light gray track which is itself outlined,
 			and flanked by two 'scroll left' and 'scroll right' buttons,
@@ -274,7 +279,7 @@ Value Definitions</h3>
 		the rendering could be a solid color [=thumb=] over a solid color [=track=],
 		as seen below.
 
-		<img src="images/flat-bar.png"
+		<img src="images/flat-bar.png" width=318 height=15
 			alt="A horizontal scrollbar with a blue featureless rounded rectangle as a thumb
 			over a featureless light gray track,
 			as was commonly seen in scrollbar designs of the early 2020s">