Name of "Keyword" workflow input object is confusing

[mccamel]

In learning how to build workflows, I found "Keyword" inputs somewhat confusing, because (a) they don't actually require you to set a keyword; (b) all other types of inputs, e.g. script filters, also can have keywords. So this type is named by a feature that is neither necessary nor sufficient to define it. What really distinguishes a "Keyword" input object from other input objects is that it outputs a free-form input text argument (i.e. it's not a filter). I suggest changing the name of keyword inputs to something like "basic" or "freeform".