enhance asset mgmt

- invoke ico directly
- invoke ico only at shortcut creation
- remove "ConvertTo-Icon" Function file

- removed image from xaml
- added stackpanel to xaml
- added functions to create viewbox with image
- added logic to add image via code to xaml & customdialog
- changed title color for customdialog

- remove webinvokes for assets from main.ps1

TODO: convert images into bitmap base64 string & add them directly into invoke-WinUtiltaskbaritem.ps1

xaml/inputXML.xaml

@@ -649,8 +649,8 @@
             <ColumnDefinition Width="*"/>
         </Grid.ColumnDefinitions>
         <DockPanel HorizontalAlignment="Stretch" Background="{MainBackgroundColor}" SnapsToDevicePixels="True" Grid.Row="0" Width="Auto">
-            <Image Height="{WinUtilIconSize}" Width="{WinUtilIconSize}" Name="WPFIcon"
-                SnapsToDevicePixels="True" Source="https://christitus.com/images/logo-full.png" Margin="10"/>
+            <StackPanel Name="NavLogoPanel" Orientation="Horizontal" HorizontalAlignment="Left" Background="{MainBackgroundColor}" SnapsToDevicePixels="True" Margin="10,0,20,0">
+            </StackPanel>
             <ToggleButton HorizontalAlignment="Left" Height="{TabButtonHeight}" Width="{TabButtonWidth}"
                 Background="{ButtonInstallBackgroundColor}" Foreground="white" FontWeight="Bold" Name="WPFTab1BT">
                 <ToggleButton.Content>