Settingsv2 fix warnings (#2076)

* updating a ton of warnings.

* bunch of cleanup

* few smaller ones

* fixed naming

* reversing an oops

* adjusting json to use attribute

* more json properties

src/core/Microsoft.PowerToys.Settings.UI/Views/KeyboardManagerPage.xaml.cs

@@ -16,7 +16,7 @@ namespace Microsoft.PowerToys.Settings.UI.Views
 
         public KeyboardManagerPage()
         {
-            this.InitializeComponent();
+            InitializeComponent();
         }
     }
 }