Add scrollbar to log details (#6917)

![](https://media.giphy.com/media/Y4pAQv58ETJgRwoLxj/giphy-downsized.gif)

The only part of the logging display that I found confusing was that there was no scroll bar, so I have added one here.

Fixes #6797

packages/devtools_app/lib/src/screens/logging/_log_details.dart

@@ -85,12 +85,14 @@ class _LogDetailsState extends State<LogDetails>
         title: _LogDetailsHeader(log: log),
         child: Padding(
           padding: const EdgeInsets.all(denseSpacing),
-          child: SingleChildScrollView(
-            controller: scrollController,
-            child: SelectableText(
-              log?.prettyPrinted() ?? '',
-              textAlign: TextAlign.left,
-              style: theme.fixedFontStyle,
+          child: Scrollbar(
+            child: SingleChildScrollView(
+              controller: scrollController,
+              child: SelectableText(
+                log?.prettyPrinted() ?? '',
+                textAlign: TextAlign.left,
+                style: theme.fixedFontStyle,
+              ),
             ),
           ),
         ),

packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md

@@ -43,7 +43,7 @@ TODO: Remove this section if there are not any general updates.
 
 ## Logging updates
 
-TODO: Remove this section if there are not any general updates.
+* Added scrollbar to details pane. - [#6917](https://github.com/flutter/devtools/pull/6917)
 
 ## App size tool updates