MDW Admin Logo Cleanup v5

Purpose:
- Removes the old wide/glow Murdock DevWorks logo from MDW Admin screens and generated documents.
- Uses the same website branding approach: compact MDW icon + text.
- No ECT, vsadmin, database, project data, download data, or config files are changed.

Files updated:
- devworks-admin/lib/functions.php
- devworks-admin/lib/document-render.php
- devworks-admin/assets/admin.css

Uses existing website asset:
- images/logo/murdock-devworks-icon.png

Optional cleanup:
The old files in images/branding/ can be left alone, but they are no longer used by MDW Admin after this patch.
