fix: keep Cua foreground actions on the target window

tests/capture-fixture.ps1

@@ -1,4 +1,4 @@
-param([string]$Title, [string]$ReadyFile, [switch]$Cover, [int]$Width=500, [int]$Height=300, [switch]$PerMonitorDpi)
+param([string]$Title, [string]$ReadyFile, [switch]$Cover, [int]$Width=500, [int]$Height=300, [switch]$PerMonitorDpi, [switch]$NormalWindow)
 if ($PerMonitorDpi) {
     Add-Type -TypeDefinition 'using System; using System.Runtime.InteropServices; public static class FixtureDpi { [DllImport("user32.dll")] public static extern IntPtr SetThreadDpiAwarenessContext(IntPtr c); }'
     [void][FixtureDpi]::SetThreadDpiAwarenessContext([IntPtr](-4))
@@ -10,7 +10,7 @@ $form.Text = $Title
 $form.Size = New-Object System.Drawing.Size($Width, $Height)
 $form.StartPosition = 'Manual'
 $form.Location = New-Object System.Drawing.Point(100, 100)
-$form.TopMost = $true
+$form.TopMost = -not $NormalWindow
 $form.BackColor = if ($Cover) { [System.Drawing.Color]::Magenta } else { [System.Drawing.Color]::Lime }
 $label = New-Object System.Windows.Forms.Label
 $label.Text = if ($Cover) { 'OCCLUDER - NOT TEST EVIDENCE' } else { 'ARTEMIS window capture fixture' }