This commit improves soft deletion of system apps. Before if the package
was missing, it failed to recover or delete system apps. Now, it works
even though if `Get-AppxPackage` returns null (i.e. package is
non-existing), so it can be executed even after a hard delete. This
allows safely introducing hard-delete of system apps (as discussed in
#260) with still keeping a robust soft-delete as complement.
Before, the script was dependent on `Get-AppxPackage.InstallLocation`,
however a system app can only be located in one of these folders:
- C:\Windows\SystemApps\{PackageFamilyName}
- C:\Windows\{ShortAppName}
To ensure resilience, this commit adjust the script to rename the files
within these directories if Get-AppxPackage fails, this provides a
fallback.
98a26f9ae4