"Alert Words" is one of Zulip's oldest settings UI elements, and as a
result is buggy. This commit converts it to use our standard
progressive-table-wrapper system used for settings tables, which has
the side effect of fixing a bug that mad ethe tables look pretty bad
if one adds a very long word.
Fixes#17172.
Now, the system uses word='' and an editing=True for rendering an
form for addition of alert words. This is a very vulnerable
way to implement said feature and this commit fixes that.
The addition form has been moved to alert_word_settings.hbs
thereby rendering it only once but always. Now, we do not have
to manually add an empty word and editing for the form to be
rendered.
As part of refactoring, the editing parameter has also been
removed as there is no purpose left.
Josh Gilley
Abhishek-Balaji
Anders Kaseorg