Added Microsoft.MixedReality.Portal to whitelistedapps

This should resolve issue #195

Windows10DebloaterGUI.ps1

@@ -123,6 +123,7 @@ $global:WhiteListedApps = @(
     "MIDIBerry"                                 # Issue 68
     "Slack"                                     # Issue 83
     "*Nvidia*"                                  # Issue 198
+    "Microsoft.MixedReality.Portal"             # Issue 195
 )
 
 #NonRemovable Apps that where getting attempted and the system would reject the uninstall, speeds up debloat and prevents 'initalizing' overlay when removing apps