It's at the bottom as it's a different kind of troubleshooting to
the rest of the items.

Fixes #93283

- Get conflicts resources from syncronisers
- adjust conflicts handling methods to take conflicts resources
- fix back up local data before accepting incoming changes

- extract getting service machine id

This reverts commit bc8aaad1.

Support for `--force-renderer-accessibility` Electron argument, needed for Linux accessibility. For #84833