Merge pull request #5399 from MicrosoftDocs/alvinashcraft/main-pt-091-cmdpal-diffs

CmdPal API ref updates for PowerToys release 0.91

Author: alvinashcraft

hub/powertoys/command-palette/microsoft-commandpalette-extensions-toolkit/listitem_constructor.md

@@ -8,6 +8,21 @@ no-loc: [PowerToys, Windows, Insider]
 
 # ListItem Constructors
 
+## ListItem() Constructor
+
+### Definition
+
+Namespace: [Microsoft.CommandPalette.Extensions.Toolkit](microsoft-commandpalette-extensions-toolkit.md)
+
+Initializes a new instance of the [ListItem](listitem.md) class.
+
+```C#
+public ListItem()
+        : base()
+    {
+    }
+```
+
 ## ListItem([ICommand](../microsoft-commandpalette-extensions/icommand.md)) Constructor
 
 ### Definition

hub/powertoys/command-palette/microsoft-commandpalette-extensions-toolkit/thumbnailhelper_getthumbnail.md

@@ -20,6 +20,10 @@ The **ThumbnailHelper.GetThumbnail(String)** method retrieves the thumbnail imag
 
 The path to the command for which the thumbnail is requested.
 
+*jumbo* **Boolean**
+
+A boolean value indicating whether to retrieve a jumbo-sized thumbnail. If set to `true`, the method will return a larger version of the thumbnail image. If set to `false`, it will return a standard-sized thumbnail. The default value is `false`.
+
 ## Returns
 
 A **Task\<IRandomAccessStream\>** that represents the thumbnail image for the specified command. If no thumbnail is found, the task will return `null`.