Added "Manually" option for remaining tasks in Settings | Scheduler page

[JaiZed]

Fix for issue #2330
Made Settings | Scheduler and System | Tasks labels match where appropriate
Removed bleed through of implementation to UI; the user will only see "None" and "Never" for the "Manually" cases in System | Tasks.
Removed obsolete 'sonarr.episodes_sync' from config
Simplified backup code.
Made spelling and capitalization consistent.

[morpheus65535]

Some linting remaining. Can you fix that please?

[JaiZed]

I was very careful when committing these files to make the changes in place. When I diff them, I don’t see any problem that I can fix.
The only thing I can think of is that I work on Windows and perhaps the git checkout converted all the files to CRLF instead of LF. Most editors handle this automatically but I guess the pretty printer doesn’t.
What is the standard for this project?
I found this link: https://stackoverflow.com/questions/10418975/how-to-change-line-ending-settings
What should I set core.autocrlf to?

[JaiZed]

I may have jumped the gun on the CRLF issue. I believe I was misled by the check:fmt
When I ran just npm run check, I saw a now unused variable declared: episodesSyncOptions and not used. That has now been removed everywhere.
I hope the CRLF is not an issue. This last commit will check if it is a problem or not.