Improve FBLO to maintain load order when purging and re-deploying

[insomnious]

Improvement

Currently

Currently the FBLO extension will completely wipe the load order file and its internal state when purging and re-deploying mods.
This will cause the load order set by the user to be reset alphabetically.

We want

Enhance the FBLO extension to maintain its load order when purging the mods, and attempt to re-instate it on deployment.
This functionality should be configurable through the game registration API functionality so that the extension author can decide if this is necessary (some extensions might implement their own sorting mechanism).

Supporting Information