- Refer to VCards instead of Avatars where appropriate
- Fetch VCards for non-groupchat messages as well

Entity items weren't being fetched from cache.

Apparently this bug only surfaced because with Ejabberd the upload
service is nested one level deeper than with Prosody.

we don't yet have a connection then, so listen to
`connectionInitialized` instead.

so that `hidden` class gets applied to the right element

- Filter did the opposite of what it was supposed to do
- Wrong bind context
- Should actually be mam:2, issue was server misconfiguration

if the fullname is not available.

This allows us to cache them for longer.

- set `username` on the message object,
  instead of always using `fullname` with fallback to `jid`.
- Distinguish better between `groupchat` messages and normal
  messages in `getMessageAttributesFromStanza`

* Translated using Weblate (Basque)

Currently translated at 90.4% (275 of 304 strings)

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

* Translated using Weblate (Basque)

Currently translated at 96.3% (293 of 304 strings)

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

* Translated using Weblate (Basque)

Currently translated at 96.7% (294 of 304 strings)

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

* Translated using Weblate (Basque)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Dutch)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Basque)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 98.0% (298 of 304 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 98.0% (298 of 304 strings)

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

* Translated using Weblate (Basque)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Norwegian Bokmål)

Currently translated at 87.1% (265 of 304 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 98.0% (298 of 304 strings)

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

* Added translation using Weblate (Flemish)

* Translated using Weblate (Flemish)

Currently translated at 94.7% (288 of 304 strings)

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

* Translated using Weblate (Flemish)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Dutch)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Flemish)

Currently translated at 100.0% (304 of 304 strings)

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

* Added translation using Weblate (Lithuanian)

* Translated using Weblate (Japanese)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Lithuanian)

Currently translated at 39.1% (119 of 304 strings)

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

* Translated using Weblate (Hungarian)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Hungarian)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Flemish)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Hungarian)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Arabic)

Currently translated at 83.2% (253 of 304 strings)

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

* Translated using Weblate (Flemish)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (Italian)

Currently translated at 84.8% (258 of 304 strings)

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

* Translated using Weblate (Italian)

Currently translated at 84.8% (258 of 304 strings)

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

* Translated using Weblate (Russian)

Currently translated at 99.3% (302 of 304 strings)

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

* Translated using Weblate (Japanese)

Currently translated at 100.0% (304 of 304 strings)

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

* Translated using Weblate (French)

Currently translated at 99.3% (302 of 304 strings)

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