Fix issues found testing stage 5 in a VM

- Calamares branding takes the version from VERSION at ISO build time
- das-update tray hides its icon when updates were installed elsewhere
  (watches the xbps package database)
- Installer removes guest tools of other hypervisors; the live image
  starts VBoxClient only inside VirtualBox
- Live session no longer locks the screen while the installer runs
- das-tools 0.2.0, das-installer 0.2.0, das-settings 0.4.0

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

srcpkgs/das-installer/template

@@ -1,6 +1,6 @@
 # Template file for 'das-installer'
 pkgname=das-installer
-version=0.1.0
+version=0.2.0
 revision=1
 depends="calamares das-snapshots das-theme sudo"
 short_desc="Das OS installer: Calamares configuration and branding for the live ISO"