This is a followup commit to #30824.
Fixes
https://chat.zulip.org/#narrow/stream/9-issues/topic/.F0.9F.8E.AF.20help.20not.20updated.20for.20new.20preferences.20sections/near/1899330.
git grep in the help directory will still show up results for `Advanced`
but those are mostly used in either plain english language instructions
or refer to some other part of the app. At the point of writing this
commit, there were 6 results for `Advanced`, 4 of which were plain
english, 1 refers to the Advanced settings in chrome for desktop
notifications, and another one refers to `Advanced configurations` for
channel settings.
Changes url from /help/all-messages to /help/combined-feed.
Also renames files "all-messages.md" and "go-to-all-messages.md"
to "combined-feed.md" and "go-to-combined-feed.md" respectively.
Fixes#27802.
This commit renames "default" views to "home" views in the setting
labels, keyboard shortcuts list, help documentation and its urls.
This commit does not do changes in variable and class names, setting
field in database, API docs and changelog.
Fixes part of #27251.