Zulip has long had the behavior that opening a stream or topic via
narrowing automatically scrolled the left sidebar to the conversation,
so that you can see it and adjacent ones readily.
When we moved private messages into the left sidebar, we didn't
implement this similar behavior; this resulted in users having to
manually scroll the sidebar in order to browser private message
conversations.
Fix this by using the standard scroll_util helpers, with some extra
care to expand the heading when going to "all private messages".
Fixes#23609.
Co-authored-by: Tim Abbott <tabbott@zulip.com>
Implemented date localization using native Intl object.
Created special function get_localized_date_or_time_for_format
Made necessary string formatting changes in 'timerender.ts'.
Fixed tests and added some localization tests too.
Tested on my local development server, with some random languages.
Fixes#23987.
Updates frontend user-facing strings with "private message" or "PM" to
use "direct message" or "DM" respectively instead.
Note that this updates translated strings as well as a few that
are not translated like search suggestions.
Updates `tools/lib/capitalization.py` for some specific strings
that are impacted by these changes, and removes "PM" and "PMs"
from checked strings.
This lets us simplify the long-ish ‘../../static/js’ paths, and will
remove the need for the ‘zrequire’ wrapper.
Signed-off-by: Anders Kaseorg <anders@zulip.com>