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/files/calamares/branding/dasos/branding.desc

@@ -12,10 +12,10 @@ navigation: widget
 strings:
     productName: "Das OS"
     shortProductName: "Das OS"
-    version: "0.2.0"
-    shortVersion: "0.2"
-    versionedName: "Das OS 0.2.0"
-    shortVersionedName: "Das OS 0.2"
+    version: "@VERSION@"
+    shortVersion: "@SHORT_VERSION@"
+    versionedName: "Das OS @VERSION@"
+    shortVersionedName: "Das OS @SHORT_VERSION@"
     bootloaderEntryName: "Das OS"
     productUrl: "https://git.das.org.ua/das/Das-OS"
     supportUrl: "https://git.das.org.ua/das/Das-OS/issues"