Counterpart of https://github.com/chatmail/core/pull/6851
* Make sending of statistics into a setting
* feat: Count securejoin sources and UI paths
* feat: Rename self_reporting to send_statistics
* Adapt core's API change
* WIP, untested: Adapt to a rename on the core side
* Adapt to generated jsonrpc
* New strings and a new dialog
* Adapt to the API change
* Rewording: `...and support research`
* "More Info" button rather than link
* Small fixes
* Open the correct survey (though it doesn't work yet)
* Changelog
* Update help
* Fix compile error
* Fix compilation
* Revert submodule change
* Don't show a device message yet
* Move "Send Statistics" setting
* Fix compilation error
* Remove unused constant
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Co-authored-by: adb <adb@merlinux.eu>