CA-115431: Disable the "apply activation key" MenuItem and show a reason if there
are more than one hosts selected.

Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
CP-6083: Number of vGPUs per pGPU was wrong. Show temporarily question marks as
the correct value is not currently retrievable.

Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
CP-6094: Moved the New Search button outside the Search panel and the Default search
under the saved Searches drop down. Also minor layout tweaks and test update.

Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>