[mediaqueries] Per resolution, change dci-p3 to the more generic p3.

Author: tabatkins

mediaqueries/Overview.bs

@@ -1464,7 +1464,7 @@ Color Display Quality: the 'color-gamut' feature</h3>
 
 	<pre class='descdef mq'>
 	Name: color-gamut
-	Value: srgb | dci-p3 | rec2020
+	Value: srgb | p3 | rec2020
 	For: @media
 	Type: discrete
 	</pre>
@@ -1496,12 +1496,12 @@ Color Display Quality: the 'color-gamut' feature</h3>
 			Note: It is expected that the vast majority of color displays
 			will be able to return true to a query of this type.
 
-		<dt><dfn>dci-p3</dfn>
+		<dt><dfn>p3</dfn>
 		<dd>
 			The output device can support approximately the gamut
 			specified by the DCI P3 Color Space or more.
 
-			Note: The ''dci-p3'' gamut is larger than and includes the ''srgb'' gamut.
+			Note: The ''p3'' gamut is larger than and includes the ''srgb'' gamut.
 
 			Issue: Add ref for DCI P3.
 
@@ -1510,7 +1510,7 @@ Color Display Quality: the 'color-gamut' feature</h3>
 			The output device can support approximately the gamut
 			specified by the ITU-R Recommendation BT.2020 Color Space or more.
 
-			Note: The ''rec2020'' gamut is larger than and includes the ''dci-p3'' gamut.
+			Note: The ''rec2020'' gamut is larger than and includes the ''p3'' gamut.
 
 			Issue: Add ref for BT.2020.
 	</dl>
@@ -1520,7 +1520,7 @@ Color Display Quality: the 'color-gamut' feature</h3>
 		in the range of DCI P3:
 
 		<pre class="lang-css">
-		@media (color-gamut: dci-p3) { … }
+		@media (color-gamut: p3) { … }
 		</pre>
 	</div>
 
@@ -1530,7 +1530,7 @@ Color Display Quality: the 'color-gamut' feature</h3>
 	As a result,
 	this feature is best used in an "ascending" fashion--
 	set a base value when ''(color-gamut: srgb)'' is true,
-	then override it if ''(color-gamut: dci-p3)'' is true, etc.
+	then override it if ''(color-gamut: p3)'' is true, etc.
 
 	Note: Some output devices,
 	such as monochrome displays,