fix: add missing resources for appbarbutton (#1475)

(cherry picked from commit 3b05672)

doc/styles/AppBarButton.md

@@ -0,0 +1,20 @@
+---
+uid: Uno.Themes.Styles.AppBarButton
+---
+
+# AppBarButton Control
+
+## Styles
+
+| Style Key                | IsDefaultStyle\* |
+|--------------------------|------------------|
+| `AppBarButtonStyle`      | True             |
+
+IsDefaultStyle\*: Styles in this column will be set as the default implicit style for the matching control
+
+## Lightweight Styling
+
+| Key                                                   | Type              | Value                              |
+|-------------------------------------------------------|-------------------|------------------------------------|
+| `AppBarButtonHeight`                                  | `Double`          | `64`                               |
+| `AppBarButtonWidth`                                   | `Double`          | `64`                               |

doc/toc.yml

@@ -45,6 +45,8 @@
   # ***************** Reference\Lightweight Styling ******************
   - name: Lightweight Styling
     items:
+    - name: AppBarButton
+      href: styles/AppBarButton.md
     - name: Button
       href: styles/Button.md
     - name: CheckBox

src/library/Uno.Material/Styles/Controls/v2/AppBarButton.xaml

@@ -8,6 +8,17 @@
 					xmlns:ios="http://uno.ui/ios"
 					xmlns:uuc="using:Uno.UI.Controls"
 					mc:Ignorable="android ios">
+	<ResourceDictionary.ThemeDictionaries>
+		<ResourceDictionary x:Key="Light">
+			<x:Double x:Key="AppBarButtonHeight">64</x:Double>
+			<x:Double x:Key="AppBarButtonWidth">64</x:Double>
+		</ResourceDictionary>
+		<ResourceDictionary x:Key="Dark">
+			<x:Double x:Key="AppBarButtonHeight">64</x:Double>
+			<x:Double x:Key="AppBarButtonWidth">64</x:Double>
+		</ResourceDictionary>
+	</ResourceDictionary.ThemeDictionaries>
+
 	<Style x:Key="MaterialAppBarButtonStyle"
 		   TargetType="AppBarButton">
 		<Setter Property="Background" Value="{ThemeResource AppBarButtonBackground}" />