VirtualBox 5.1.20 released

[frank]

VirtualBox 5.1.20 is a maintenance release. The following items were fixed and/or added since VirtualBox 5.1.18:

• GUI: don't check if the Extension Pack is up-to-date if the user is about to install a new Extension Pack (bug #16317)
• GUI: fixed a possible crash when switching a multi-monitor VM into full-screen or seamless mode
• GUI: fixed non-literal shortcuts if the keyboard is not captured (5.1.10 regression; Windows hosts only)
• GUI: several mini-toolbar fixes in full-screen / seamless mode (X11 hosts only)
• GUI: don't crash on restoring defaults in the appliance import dialog
• Windows Additions: another fix for automatic logins for Windows Vista and newer (bug #15904)
• ICH9: fix for Windows guests with a huge amount (>64G) of guest memory
• BIOS: fixed El Torito hard disk emulation geometry calculation (thanks Dwight Engen)