A temporary commit.
Revert "Fix bug where right-clicking in an "empty" part of the notes manager causes a run-time error."

This reverts commit 6e17f310a4811bf8979230db022c08f26506815b.
Fix scrolling bug and update documentation.
On branch master, changes to be committed:
	modified:   Quark_Documentation/Configuration.md
	modified:   Quark_Documentation/Getting_Started.md
	modified:   README.md
	modified:   mainwindow.py
	modified:   quarknotemanagermodel.py
	modified:   session.json