Add validate method to search control
Add validate method to search control

This validate method will tell the user which labels are invalid and instructs the user to remove them.

Signed-off-by: Don Naegely <e690a32c1e2176a2bfface09e204830e1b5491e3@gmail.com>

chop-dbhi/cilantro,chop-dbhi/cilantro,chop-dbhi/cilantro