0.11a smoke tests
=================
- Re-test 0.11 shell Encrypt/Decrypt context menu.
- Confirm .$#! icon after installer + Explorer restart.
- Large file: no "Keine Rückmeldung" at ~70% flush boundary.
- Progress dialog prefers right side of password dialog.
- Click Abbruch near 70%; UI stays responsive, partial temp is cleaned after flush joins.
- Re-test one normal encrypt/decrypt round trip; sizes and CT64FILE v1 unchanged.
