Seamless mode hides mini ToolBar

[bq]

This bug goes back to VB 5.2, if memory serves. It was fixed in 6.1 RC1, so I thought "great!", but in the 6.1 release, the problem has returned.

On Solaris, Linux, and FreeBSD (BSD using the OSE release) hosts, when a VMs is in seamless mode (like Win 7 and these same Linux/UNIX variants), the VB mini ToolBar is hidden behind the guest's toolbar if they are on the same edge of the screen. There is no way to bring it forward, even if you set your guest to auto-hide its toolbar.

Attached log is from Windows 7, but it also happens with other guests that have a desktop that works well with seamless mode, like MATE or Gnome2.

This also happens if I use 6.1.0 with the 6.1.0RC1 guest additions.