Update spec based on resolved issues

Applies resolutions from following issues:

- #7956
- #7874
- #7812

Author: khushalsagar

css-view-transitions-1/Overview.bs

@@ -611,6 +611,8 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 
 			Issue: The link for "paint order" doesn't seem right.
 				Is there a more canonical definition?
+		
+			1. If the |element|'s ancestor [=skips its contents=], then [=continue=].
 
 			1. Let |transitionName| be the [=computed value=] of 'view-transition-name' for |element|.
 
@@ -706,6 +708,8 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 
 						Issue: The link for "paint order" doesn't seem right.
 							Is there a more canonical definition?
+		
+						1. If the |element|'s ancestor [=skips its contents=], then [=continue=].
 
 						1. Let |transitionName| be the [=computed value=] of 'view-transition-name' for |element|.
 
@@ -786,7 +790,13 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 
 			Note: The ready promise would've been resolved if {{ViewTransition/skipTransition()}} is called after we start animating.
 
-		1. [=Reject=] |transition|'s [=ViewTransition/finished promise=] with |reason|.
+		1. [=promise/React=] to [=ViewTransition/DOM updated promise=]:
+
+			* If [=ViewTransition/DOM updated promise=] was resolved,
+				then [=resolve=] |transition|'s [=ViewTransition/finished promise=].
+
+			* If [=ViewTransition/DOM updated promise=] was rejected with reason |r|,
+				then [=reject=] |transition|'s [=ViewTransition/finished promise=] with |r|.
 	</div>
 
 ## [=Capture the image=] ## {#capture-the-image-algorithm}
@@ -1070,6 +1080,10 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 				1. At the [=user-agent origin=],
 					set |new|'s 'object-view-box' property to a value that when applied to |new|,
 					will cause the view box to coincide with [=new element=]'s [=border box=] in the image.
+		
+		This algorithm must be executed to update styles in [=user-agent origin=] if its effects can be observed by a web API.
+		
+		Note: An example of such a web API is `window.getComputedStyle(document.documentElement, "::view-transition")`.
 	</div>
 
 	<div algorithm>