Prevent files docs/help/basic/config/keep-in-touch.md and docs/help/context/configuration-keepintouch.md from being processed by removing them.
Replace 'keep in touch' with 'update'
Fixes: #13703
Test-bot: skip
Replace screen shots for Keyman Configuration still showing 'keep in touch' tab with new screen shots showing 'update' tab.
In addition keep help documentation in synch with referencing 'update'
tab instead of 'keep in touch' tab.
Fixes: #13703
Test-bot: skip
Add Base Keyboard, Proxy Settings, and Keyman System Settings
documentation and links to the Options context help.
Fixes: keymanapp/help.keyman.com#10
Test-bot: skip