Improvements for GUI and replacing .exe

[configforgelabs]

GUI.ps1 UI elements have been added to provide the possibility to define Client ID and Redirect URI. By default the default app 14d82eec-204b-4c2f-b7e8-296a70dab67e is used.

ImportedFromCSV.ps1 Uses by default the client id 14d82eec-204b-4c2f-b7e8-296a70dab67e

Replaced EXE with CMD When changes happen to GUI the EXE needs to rebuild. To avoid this issue with pull requests I replaced it with a .cmd just like how it is used at https://github.com/Micke-K/IntuneManagement/blob/master/Start.cmd

README Replaced the GUI example image with the new version Replaced .exe instructions with .cmd