fixes & testapp

Pilz.UI.AvaloniaUI.TestApp/MainWindow.axaml

@@ -0,0 +1,14 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:my="https://git.pilzinsel64.de/pilz-framework/pilz"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="Pilz.UI.AvaloniaUI.TestApp.MainWindow"
+        Title="Pilz.UI.AvaloniaUI.TestApp">
+    
+    <StackPanel>
+        <my:ImageButton Text="Nice" Width="105"/>
+        <my:ImageSplitButton Text="Nice" Width="105"/>
+    </StackPanel>
+</Window>