Allow Custom Think Times

There are moments in scripts where I need extra think time to wait for elements to appear. Setting a 'Fixed' time would only add unnecessary time to the entire script, and setting it to the 'Recorded' times is too inflexible. I'm not even sure why you are even able to edit and save the values, as the script ignores them completely. There should be a Custom setting which has the script follow the edited times. These times can be pre-filled with the 'Recorded' or 'Fixed' times it came from.