Changes all the uses of the word "operators" to "filters" in
contributor docs, help center, and landing page to align with
the updated help center documentation.
Renames the help article on custom profile fields to reflect that
its content is not just about adding fields.
Adds a redirect from the old URL to the new URL and updates internal
links, linking to #add-a-custom-profile-field where appropriate.
Fixes#23170.
Removes the default title element of "Zulip" from `base.html` and
the default meta-description sentence from `meta_tags.html`. Also
removes default open graph metadata.
For portico templates that would would fail tests, set both
`PAGE_TITLE` and `PAGE_DESCRIPTION` variables with appropriate
content.
Co-authored-by: Alya Abbott <alya@zulip.com>
Renames existing template variables starting with `OPEN_GRAPH` to be
either `PAGE` or `PAGE_METADATA` since these variables are used for
adding both open graph metdata and page titles/descriptions for SEO.
The check-handlebars-templates script now looks at most of our
back end templates to try and find imbalanced tags. This commit
fixes a bunch of the existing templates.
(imported from commit fad4a5d85d68160370dd588b41d6f125f64d198f)