Handle UI Freezes when IMGR is called from WPF

[georgend]

Use asynccommandruntime to handle async calls.
Fix double formatted resource strings.

Testing
Client was using the script references in issue #390
Local testing using client script shows the freezes no longer occur.

Fixes #436
Fixes #390

[peombwa]

It looks like the UI freeze also happens with Connect-MgGraph when called with -ForceRefresh. Consider using NoSynchronizationContext with Connect-MgGraph as well.

Here is a repro of the same :

Add-Type -AssemblyName PresentationFramework

[xml]$xaml = @"
<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    Title="Window" Height="200" Width="300">
    <Grid Background="#FFECECEC">
    <Button Name="button1" Content="Connect-MgGraph" HorizontalAlignment="Left" Margin="10,10,10,10" VerticalAlignment="Top"/>
	<Button Name="button2" Content="Connect-MgGraph -ForceRefresh" HorizontalAlignment="Left" Margin="10,30,10,10" VerticalAlignment="Top"/>
    <Button Name="button3" Content="Invoke-GraphRequest" HorizontalAlignment="Left" Margin="10,50,10,10" VerticalAlignment="Top"/>
    </Grid>
    </Window>
"@

$reader = (New-Object System.Xml.XmlNodeReader $xaml)

$window = [Windows.Markup.XamlReader]::Load($reader)

$button1 = $window.FindName("button1")
$button1.Add_Click( {
    write-host (Connect-MgGraph | out-string)
})

$button2 = $window.FindName("button2")
$button2.Add_Click( {
    write-host (Connect-MgGraph -ForceRefresh | out-string)
})

$button3 = $window.FindName("button3")
$button3.Add_Click( {
    write-host (Invoke-GraphRequest -uri "https://graph.microsoft.com/v1.0/users" | out-string)
})

$window.ShowDialog()

See comment