Description of problem:
When choosing vm in suspended mode + vm in Down mode (or vm in up mode + vm in down mode)
the remove button is disabeld. 
according the thumb rule of multipule selstion, if at least one of
the VMs selected is in a status which permits the operation then it will
be allowed

Version-Release number of selected component (if applicable):
3.6
vdsm-4.17.0-632.git19a83a2.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1. select vm in up mode and vm in down mode
2. right click -> see that the remove button in disabled
3.

Actual results:
the remove button in disabled

Expected results:
the remove button should not be disabeld

Additional info: