Fixes existing errors in the help center documentation where a
keyboard shortcut that has multiple keys is all one inline code
tag (e.g. `Ctrl + [`) instead of being separated into individual
inline code tags for each key (e.g. `Ctrl` + `[`).
Add `escape_navigates_to_default_view` as a bool setting in
UserBaseSettings model and implement it as a checkbox that toggles
the hotkey implementation of escape to the default view in the
advanced user display settings.
With /help/ documentation edits from Alya Abbott.
Fixes#20043.
Lauryn Menard
Anders Kaseorg
Lauryn Menard