Plugin doesn't creates project conflict files.

[jozef-budac]

The plugin doesn't create conflict files, when there is a conflict in the project qgz file. It shows a message, there there is a conflict and that the file is created, but the file is missing in the project directory. This problem is already present in the released plugin.

Scenario:

1. have a simple project and open it in QGIS (user can have writer and above permission)
2. Change project settings and "Project -> Properties -> General -> Units for distance measurement set to Inches
3. make a copy of the project file for later use
4. Change project settings and "Project -> Properties -> General -> Units for distance measurement set to Yards
5. Upload the project file from 2nd step to a project using the web interface
6. Synchronize the project, you can see that there are upstream and downstream changes in the project file
7. Hit sync
   -> Now a new conflict found modal window appears, which says, conflict file is created
   -> Check, the file is missing in the project directory