Add List does not show error

[0verEngineer]

Steps to reproduce

1. Create a lot of new lists in a short time
2. For me the 11th one will not be created
3. check the network log of the browser

Expected behavior

Creating lists should always work or the app should show an error

Actual behaviour

It silently fails

Tasks app version

No response

CalDAV-clients used

No response

Browser

No response

Client operating system

No response

Server operating system

No response

Web server

None

Database engine version

None

PHP engine version

None

Nextcloud version

No response

Updated from an older installed version or fresh install

None

List of activated apps

No response

Nextcloud configuration

No response

Web server error log

<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns" xmlns:o="http://owncloud.org/ns">
  <s:exception>OCA\DAV\Connector\Sabre\Exception\TooManyRequests</s:exception>
  <s:message>Too many calendars created</s:message>
  <o:hint xmlns:o="o:">too many requests</o:hint>
</d:error>

Log file

No response

Browser log

No response

Additional info

No response

[Ripsnapper]

This happens because of the rate limit of the dav backend. In case you want to change the rate limits that is explained here: https://docs.nextcloud.com/server/latest/admin_manual/groupware/calendar.html#rate-limits

I added an error dialog in #2607