Various condition editor fixes

[stevecassidy]

The condition editor offers the 'contains' operator for string values but that operator is defined as a list operator. There are other more specific list operators (contains-one-of, etc) so we could fix 'contains' to be 'has-sub-string' instead and keep it for string values.

[stevecassidy]

Also noted that numeric fields also have 'contains' and 'regex' which is not appropriate.

[stevecassidy]

Also note that you can add fields from other forms into conditions.