Minor bug in web client when entering VLAN

I seem to have run across a minor bug in the web client when entering a VLAN.  I'm running vCenter Server 5.5 (appliance).

To replicate:

Create a portgroup on a standard switch with VLAN 4000.

Try to create another portgroup, on VLAN 40. 

The client autofills the 4000, and because spaces are not allowed, there is no way to indicate that you want it to stop at 40, and not 4000.

I was finally able to create the VLAN, by entering it as 0040, but that is a workaround, not a fix.