merge (#18)

* refactor

* refactor

* refactor

* resharp

* resharp.

* refactor

* gui

* Add dummy MenuBar to FileManagerPage, WorkbenchPage. Minor tweaks.

* Remove german strings temporarily

* refactor

* refactor

* gui

* enhance gui; add Graph adapters

* connect to graph

* connect to graph

* connect to graph

* gui

* Add Microsoft365Page

* Add Microsoft365Page

* refactoring. gui.

* refactor. code quality.

Author: tajbender