Let Nextcloud Appear in Microsoft Office "Open" and "Save as" dialogues

Microsoft Office 2021 Professional (and other Microsoft Office versions and variants) allows the addition of cloud storage services to fast access in the "Open" and the "Save As" dialogues:

Commercial cloud storage clients (both, Microsoft services like _OneDrive_ and Non-Microsoft services like _Dropbox_) register themselves and appear in these dialog boxes. I find it useful if Nextcloud could do the same after installing Nextcloud Desktop Client on Windows.

More information about this feature can be found at Microsoft.com: https://techcommunity.microsoft.com/t5/storage-at-microsoft/adding-work-folders-to-office-locations/ba-p/425617