Handle referenceId for system messages e.g. when uploading a file

[nickvergessen]

Signed-off-by: Joas Schilling coding@schilljs.com

[nickvergessen]

Failing unit tests are fixed with nextcloud/server#22027

[danxuliu]

Tested and works 👍

One little thing that I have noticed: if you upload a large file and send new messages while the file is being uploaded the file will appear after those messages. Honestly I do not know if a user would expect the file to appear in the message list where it started to upload or where it ended to upload.

Also I guess that to change the behaviour some more hacks will be needed to explicitly assign a date to system messages or something like that, so I do not know if it is worth the trouble. In any case, something for a follow up pull request I would say.

[nickvergessen]

One little thing that I have noticed: if you upload a large file and send new messages while the file is being uploaded the file will appear after those messages. Honestly I do not know if a user would expect the file to appear in the message list where it started to upload or where it ended to upload.

Hmm yeah well it's the same for when your sending a message takes longer the order could be different if you dont wait for the finishing.