[css-2020] Add specs to the right sections

As per w3c#4715 (comment)

Author: frivoal

css-2020/Overview.bs

@@ -254,17 +254,33 @@ Background: The W3C Process and CSS</h3>
 			and custom properties for defining them.
 
 		<dt><a href="https://www.w3.org/TR/css3-transforms/">CSS Transforms Level 1</a>
-		  [[CSS3-TRANSFORMS]]
+		  [[!CSS3-TRANSFORMS]]
 		<dd>
 			Introduces graphical transformations to CSS.
 
 		<dt><a href="https://www.w3.org/TR/css-contain-1/">CSS Containment Module Level 1</a>
-		  [[CSS-CONTAIN-1]]
+		  [[!CSS-CONTAIN-1]]
 		<dd>
 			Describes the 'contain' property,
 			which indicates that the element’s subtree is independent of the rest of the page.
 			This enables heavy optimizations by user agents when used well.
 
+		<dt><a href="https://www.w3.org/TR/css-cascade-4/">CSS Cascading and Inheritance Level 4</a>
+		  [[!CSS-CASCADE-4]]
+		<dd>
+			Extends and supersedes [[CSS-CASCADE-3]],
+			describing how to collate style rules and assign values to all properties on all elements.
+			By way of cascading and inheritance, values are propagated for all properties on all elements.
+
+		<dt><a href="https://www.w3.org/TR/css-easing-1/">CSS Easing Functions Level 1</a>
+		  [[!CSS-EASING-1]].
+		<dd>
+			Describes a way for authors to define a transformation
+			that controls the rate of change of some value.
+			Applied to animations,
+			such transformations can be used to produce animations
+			that mimic physical phenomena such as momentum
+			or to cause the animation to move in discrete steps producing robot-like movement.
 	</dl>
 
 	<div class="note">
@@ -276,8 +292,7 @@ Background: The W3C Process and CSS</h3>
 			<dt><a href="https://www.w3.org/TR/css3-transitions/">CSS Transitions Level 1</a>
 			  [[CSS3-TRANSITIONS]]
 			  and <a href="https://www.w3.org/TR/css3-animations/">CSS Animations Level 1</a>
-			  [[CSS3-ANIMATIONS]],
-			  together with <a href="https://www.w3.org/TR/css-easing-1/">CSS Easing Functions Level 1</a> [[CSS-EASING-1]].
+			  [[CSS3-ANIMATIONS]].
 			<dd>
 				Define mechanisms for transitioning the computed values of CSS properties over time.
 
@@ -368,12 +383,23 @@ Background: The W3C Process and CSS</h3>
 				Extends and supersedes [[CSS3-MEDIAQUERIES]], expanding the syntax, deprecating most media types,
 				and introducing new media features.
 
-			<dt><a href="https://www.w3.org/TR/css-cascade-4/">CSS Cascading and Inheritance Level 4</a>
-			  [[CSS-CASCADE-4]]
+			<dt><a href="https://www.w3.org/TR/css-writing-modes-4/">CSS Writing Modes Level 4</a>
+			  [[CSS-WRITING-MODES-4]]
+			<dd>
+				Extends and supersedes [[CSS-WRITING-MODES-3]],
+				adding more options for vertical writing.
+
+			<dt><a href="https://www.w3.org/TR/css-display-3/">CSS Display Module Level 3</a>
+			  [[CSS-DISPLAY-3]]
+			<dd>
+				Describes how the CSS formatting box tree is generated
+				from the document element tree
+				and defines the display property that controls it.
+
+			<dt><a href="https://www.w3.org/TR/css-font-loading/">CSS Font Loading Module Level 3</a>
+			  [[CSS-FONT-LOADING-3]]
 			<dd>
-				Extends and supersedes [[CSS-CASCADE-3]],
-				describing how to collate style rules and assign values to all properties on all elements.
-				By way of cascading and inheritance, values are propagated for all properties on all elements.
+				Describes events and interfaces used for dynamically loading font resources.
 		</dl>
 
 		We hope to incorporate them into a future snapshot.
@@ -729,6 +755,7 @@ Safe to Release pre-CR Exceptions</h2>
 	css-ui-3,
 	compositing-1,
 	css-writing-modes-3,
+	css-writing-modes-4,
 	css-transitions-1,
 	css-animations-1,
 	css-easing-1,
@@ -747,7 +774,9 @@ Safe to Release pre-CR Exceptions</h2>
 	filter-effects-1,
 	css-break-3,
 	css-contain-1,
-	css-scroll-snap-1"></index>
+	css-scroll-snap-1,
+	css-display-3,
+	css-font-loading-3"></index>
 
 <h3 id="selectors">Selector Index</h3>
 
@@ -771,6 +800,7 @@ Safe to Release pre-CR Exceptions</h2>
 	css-ui-3,
 	compositing-1,
 	css-writing-modes-3,
+	css-writing-modes-4,
 	css-transitions-1,
 	css-animations-1,
 	css-easing-1,
@@ -789,7 +819,9 @@ Safe to Release pre-CR Exceptions</h2>
 	filter-effects-1,
 	css-break-3,
 	css-contain-1,
-	css-scroll-snap-1"></index>
+	css-scroll-snap-1,
+	css-display-3,
+	css-font-loading-3"></index>
 
 <h3 id="at-rules">
 At-Rule Index</h3>
@@ -814,6 +846,7 @@ At-Rule Index</h3>
 	css-ui-3,
 	compositing-1,
 	css-writing-modes-3,
+	css-writing-modes-4,
 	css-transitions-1,
 	css-animations-1,
 	css-easing-1,
@@ -832,7 +865,9 @@ At-Rule Index</h3>
 	filter-effects-1,
 	css-break-3,
 	css-contain-1,
-	css-scroll-snap-1"></index>
+	css-scroll-snap-1,
+	css-display-3,
+	css-font-loading-3"></index>
 
 <h3 id="properties">Property Index</h3>
 
@@ -856,6 +891,7 @@ At-Rule Index</h3>
 	css-ui-3,
 	compositing-1,
 	css-writing-modes-3,
+	css-writing-modes-4,
 	css-transitions-1,
 	css-animations-1,
 	css-easing-1,
@@ -874,7 +910,9 @@ At-Rule Index</h3>
 	filter-effects-1,
 	css-break-3,
 	css-contain-1,
-	css-scroll-snap-1"></index>
+	css-scroll-snap-1,
+	css-display-3,
+	css-font-loading-3"></index>
 
 <h3 id="values">Values Index</h3>
 
@@ -898,6 +936,7 @@ At-Rule Index</h3>
 	css-ui-3,
 	compositing-1,
 	css-writing-modes-3,
+	css-writing-modes-4,
 	css-transitions-1,
 	css-animations-1,
 	css-easing-1,
@@ -916,7 +955,9 @@ At-Rule Index</h3>
 	filter-effects-1,
 	css-break-3,
 	css-contain-1,
-	css-scroll-snap-1"></index>
+	css-scroll-snap-1,
+	css-display-3,
+	css-font-loading-3"></index>
 
 Acknowledgements {#acks}
 ========================