update docs text and replace most screenshots with GUI updates

What do these changes do?

Updates all documentation text. Replace screenshots with new ones for the updated GUI.

[x] I think the documentation is well written and up to date
[ ] Do NOTE have very large media files (e.g. photos, videos, etc)
[x] My spell-checker passes
[ ] If you write a new section, i take ownership adding my user in .github/CODEOWNERS