Apply suggestions from code review

Co-authored-by: Alexander Ebert <[email protected]>

Author: Cyperghost

docs/javascript/components_image_viewer.md

@@ -19,15 +19,15 @@ The following code example adds an image to the global modal and groups it with
 
 ```smarty
 <a href="{$imageLink}" data-caption="{$caption}" data-fancybox>
-	<img src="{$imageLink}">
+	<img src="{$thumbnailUrl}" width="…" height="…" alt="">
 </a>
 ```
 
 If you want to display several images in a group, you can group them using the `data-fancybox` attribute. Images with the same group name are then displayed together:
 
 ```smarty
 <a href="{$imageLink}" data-caption="{$caption}" data-fancybox="fooBar">
-	<img src="{$imageLink}">
+	<img src="{$thumbnailUrl}" width="…" height="…" alt="">
 </a>
 ```
 
@@ -73,7 +73,7 @@ final class FooBBCode extends AbstractBBCode
 
 ```smarty title="shared_bbcode_foo.tpl"
 <a href="{$imageLink}" data-caption="{$caption}" data-fancybox="message-{$activeMessageObjectType}-{$activeMessageObjectID}">
-	<img src="{$imageLink}">
+	<img src="{$thumbnailUrl}" width="…" height="…" alt="">
 </a>
 ```
 

docs/migration/wsc61/templates.md

@@ -2,22 +2,22 @@
 
 ## Image Viewer
 
-The previous image viewer `WCF.ImageViewer` has been open by the HTML class `.jsImageViewer`.
+The previous image viewer `WCF.ImageViewer` used the CSS class `.jsImageViewer` to open the image viewer.
 From now on this is done via the attribute `data-fancybox`, which opens the new [Image Viewer](../../javascript/components_image_viewer.md).
-Which also now supports grouping, `data-fancybox="foo"`.
+Grouping is supported through the attribute `data-fancybox="foo"`.
 
 #### Previous Code Example
 
 ```smarty
 <a href="{$link}" class="jsImageViewer" title="{$title}">
-    <img src="{$link}">
+    <img src="{$thumbnailUrl}" width="…" height="…" alt="">
 </a>
 ```
 
 #### New Code Example
 
 ```smarty
 <a href="{$link}" data-caption="{$title}" data-fancybox>
-    <img src="{$link}">
+    <img src="{$thumbnailUrl}" width="…" height="…" alt="">
 </a>
 ```