Addresses feedback from Gavin (VPM):
- Sort folders alphabetically in both upload tree and admin tree views
- Auto-select VPM as default folder on login instead of Root
- Fix S3 key construction for nested folders: convert "/" to "--" so FLX
correctly maps subfolders (e.g. Content/TEST - AMPP Demo now produces
Content--TEST - AMPP Demo--file.ext instead of Content/TEST - AMPP Demo--file.ext)
- Clarify HTTP mode note: "Files are processed 6 at a time" instead of
"up to 6 concurrent files" which implied a total file limit
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>