As a follow up to commit ad013a9, this updates the /help/dark-theme
docs to describe the newer way to switch themes via the theme switcher,
located in the Personal Menu.
This replaces the documentation on switching themes via
"Personal Settings".
Fixes#29550.
This includes changing the URL to #settings/preferences, with a
transparent redirect so that existing links, like the one from Welcome
Bot, continue to work.
Rename 'Sync with computer' to 'Automatic (follows system settings)',
'Light Theme' to 'Light' and 'Dark Theme' to 'Dark', and rename the
color scheme label to 'Theme'.
Reorder the dropdown menu to have light theme before dark theme.
These files are not Jinja2 templates, so there's no reason that they needed
to be inside `templates/zerver`. Moving them to the top level reflects their
importance and also makes it feel nicer to work on editing the help center content,
without it being unnecessary buried deep in the codebase.
Alya Abbott
Sayam Samal
David Rosa
nimish
palashb01
Lauryn Menard