## Link to GitHub Issue, if one exists
#0
## Description of change
The original launcher::detect_bootstrap_release_code() wasn't detecting
user specified bootstrap.xml path, and was causing issues for
patch_manager and other ext check spots prior to ea3 init (as ea3 does
proper path check itself).
I've added the user path check and proper xml parsing from
detect_gameversion().
## Testing
Tested with prop/bootstrap.xml presents.
Tested with prop/bootstrap.xml not presents and -b
/path/to/bootstrap.xml
