to make it clearer that this toggle relates to chatting.

to avoid name clashes

because it didn't actually clear anything permanently and upon page
reload the messages were there again.

This cause the error "Mismatched anonymous define" when loading the
bundle in Plone.

The original reason for adding `start.frag` was to wrap the bundle in a
closure to not pollute the global namespace (e.g. overriding global
`define` and `require` with Almond`s versions) and secondarily to allow
people to load the bundle via require.js.

The second usecase should now probably be done via a shim in the
require.js config.

* Translated using Weblate (German)

Currently translated at 94.0% (268 of 285 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/de/

* Translated using Weblate (Chinese (Traditional))

Currently translated at 35.7% (102 of 285 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/zh_Hant/

* Translated using Weblate (Russian)

Currently translated at 60.3% (172 of 285 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/ru/

* Translated using Weblate (French)

Currently translated at 100.0% (285 of 285 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/fr/

* Translated using Weblate (Portuguese (Brazil))

Currently translated at 90.5% (258 of 285 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/pt_BR/

* Translated using Weblate (Ukrainian)

Currently translated at 60.3% (172 of 285 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/uk/

* Translated using Weblate (Dutch)

Currently translated at 100.0% (290 of 290 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/nl/

* Translated using Weblate (Turkish)

Currently translated at 0.3% (1 of 285 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/tr/

* Translated using Weblate (Chinese (Simplified))

Currently translated at 30.3% (88 of 290 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/zh_Hans/

* Translated using Weblate (Norwegian Bokmål)

Currently translated at 94.1% (273 of 290 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/nb/

* Added translation using Weblate (Bulgarian)

* Translated using Weblate (Bulgarian)

Currently translated at 40.3% (117 of 290 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/bg/

* Translated using Weblate (Japanese)

Currently translated at 100.0% (290 of 290 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/ja/

* Added translation using Weblate (Arabic)

* Translated using Weblate (Arabic)

Currently translated at 71.3% (207 of 290 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/ar/

* Translated using Weblate (Spanish)

Currently translated at 95.1% (276 of 290 strings)

Translation: Converse.js/Translations
Translate-URL: https://hosted.weblate.org/projects/conversejs/translations/es/

- Mention CSS file needed for embedded case.
- Update some outdated text