Template Handler can result in complete template deletion and re-creation.

[NikRimington]

Describe the bug
If your list of changes includes a deletion of "master" template and the change of a "selected master template" on another template the template is deleted and re-created.

E.g. If the starting data setup looks like this:

• Master A
  • Template 1
  • Template 2
• Master B
  • Template 3
  • Template 4

And you make the changes in the back office to put the templates like this:

• Master A
  • Template 1
  • Template 2
  • Template 3 (moved)
  • Template 4 (moved)
• Master B (deleted)

When you import the updated uSync files into a destination site, the Delete of Master B will happen first, as a result Templates 3 and 4 are deleted and then re-created giving them new ID's. Any documents that use Templates 3 / 4 will now be broken as they are looking for the old ID.

To Reproduce

1. Create a v13 (latest) site including the clean starter kit and the latest V13 compatible uSync
2. Log into the back office
3. Create a new template call "Master Temp"
4. Update the Article template to set it's Master template to "Master Temp"
5. Stop the site and duplicate it
6. Run the duplicate site to verify it works and the article pages are working correctly - alternatively, open the DB and confirm the ID of the Article template.
7. Run the first site and go back to the "settings" section of Umbraco
8. Move the Article template to be a child of the original Master template
9. Delete the Master Temp template
10. Stop the site and copy the usync files for Templates, into the duplicated site
11. Run the duplicated site
12. Perform a uSync import
13. Open the DB and verify that the ID of the Article template is now different - additionally article pages will now be broken unless they get an explicit save and publish

Expected behavior
I would expect templates that have been moved from under the master being deleted to be moved before the deletion occurs.

Additional context
This is a non-recoverable error if the site is large with content in various states as the pages impacted by the deletion could have a published version different to the current draft version.

If the templates aren't using the Parent Child relationship in the back office, they appear to be safe.

[KevinJump]

Fixed in v13.2.5 release https://github.com/KevinJump/uSync/releases/tag/v13.2.5