Initial

LehrerApp.Desktop/Views/SyncStatusBar.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.SyncStatusBar"
+             x:DataType="vm:SyncStatusViewModel">
+
+  <Grid ColumnDefinitions="*,Auto">
+    <StackPanel Grid.Column="0">
+      <TextBlock Text="{Binding StatusText}" FontSize="12"
+                 Opacity="0.7" TextTrimming="CharacterEllipsis"/>
+      <TextBlock Text="{Binding LastSyncText}" FontSize="10"
+                 Opacity="0.4"/>
+    </StackPanel>
+    <Button Grid.Column="1"
+            Command="{Binding SyncNowCommand}"
+            IsVisible="{Binding IsServerConfigured}"
+            ToolTip.Tip="Jetzt synchronisieren"
+            Padding="6,4">
+      <TextBlock Text="↻" FontSize="14"
+                 IsVisible="{Binding !IsSyncing}"/>
+    </Button>
+  </Grid>
+
+</UserControl>