Initial

LehrerApp.Desktop/Views/NavButton.axaml

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+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels"
+             x:Class="LehrerApp.Desktop.Views.NavButton">
+
+  <Button Command="{Binding Command, RelativeSource={RelativeSource AncestorType=UserControl}}"
+          CommandParameter="{Binding CommandParameter, RelativeSource={RelativeSource AncestorType=UserControl}}"
+          HorizontalAlignment="Stretch"
+          HorizontalContentAlignment="Left"
+          Padding="10,8"
+          CornerRadius="6"
+          Background="Transparent">
+
+    <Grid ColumnDefinitions="24,*">
+      <TextBlock Grid.Column="0"
+                 Text="{Binding Icon, RelativeSource={RelativeSource AncestorType=UserControl}}"
+                 FontFamily="Segoe MDL2 Assets"
+                 FontSize="14"
+                 VerticalAlignment="Center"
+                 HorizontalAlignment="Center"
+                 Opacity="0.7"/>
+      <TextBlock Grid.Column="1"
+                 Text="{Binding Label, RelativeSource={RelativeSource AncestorType=UserControl}}"
+                 FontSize="13"
+                 VerticalAlignment="Center"
+                 Margin="8,0,0,0"/>
+    </Grid>
+
+    <Button.Styles>
+      <Style Selector="Button:pointerover /template/ ContentPresenter">
+        <Setter Property="Background"
+                Value="{DynamicResource SystemControlBackgroundListLowBrush}"/>
+      </Style>
+    </Button.Styles>
+
+  </Button>
+
+</UserControl>