misleading "Required string" label in web monitoring

web monitoring steps used to have a field "Required" before 2.2.
zabbix 2.2 changed that label to "Required string".
while it was an attempt to make it more clear what this field is about, the new label is a bit misleading - it implies that only a plain string can be matched here, but the matching actually supports regexps, too.
not sure how to improve it easily, though