renaming display settings -> preferences

[Aditya8840]

Finished renaming display settings -> preferences

Fixes #26874

web/e2e-tests/settings.test.ts
web/src/admin.js
web/src/server_events_dispatch.js
web/src/settings.js
web/src/settings_config.ts
web/templates/settings/display_settings.hbs
web/templates/settings/organization_user_settings_defaults.hbs
web/templates/settings/user_display_settings.hbs
web/templates/settings_tab.hbs
web/tests/i18n.test.js
zerver/actions/user_settings.py
zerver/lib/event_schema.py
zerver/lib/events.py
zerver/models.py
zerver/tests/test_event_system.py
zerver/tests/test_events.py
zerver/tornado/event_queue.py

[zulipbot]

Hello @Aditya8840, it seems like you have referenced #26874 in your pull request description, but you have not referenced them in your commit message description(s). Referencing an issue in a commit message automatically closes the corresponding issue when the commit is merged, which makes the issue tracker easier to manage.

Please run git commit --amend in your command line client to amend your commit message description with Fixes #26874..

An example of a correctly-formatted commit:

commit fabd5e450374c8dde65ec35f02140383940fe146
Author: zulipbot
Date:   Sat Mar 18 13:42:40 2017 -0700

    pull requests: Check PR commits reference when issue is referenced.

    Fixes #51.

To learn how to write a great commit message, please refer to our guide.