Small issue with selection button

[Roel]

IIRC: when creating a new VM, if you create a new vdi (while also deleting an old vdi) and then want to select it, the section box doesn't work/is grayed out.

I could not repeat the issue, but it was something like: create new vm, select 'use existing disk', select a vdi which will be deleted shortly, click on folder icon, delete the vdi that was selected in previous screen, create new vdi and select it. Then on returning to the 'Create new virtual machine' window the drop down box is grayed out. Swapping to/from 'create new hard disk' (and then back to 'use existing hard disk') enabled the selection again.

[Frank Mehnert]

Please reopen if still relevant with VBox 4.0.8.