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.
Abhishek-Balaji
Anders Kaseorg