Trailing spaces in VM names are not handled consistently when grouping

[m6477]

1. Create 3 new VMs "test1", "test2", "test3 ". The VM names do not include the quotation marks, but test 3 has a trailing space in its name.
2. Select all three new VMs and create a new group for them.

The VMs all appear in the group in the Virtual Box Manager GUI, but when I look at the directories where the data is stored, I see that test1 and test2 have been moved into a subdirectory named "new group", but test3_ (directory name has underscore instead of space) has not been moved into the subdirectory - it remains in its original parent directory