Step edit text: Remove autoComplete

http://stackoverflow.com/questions/13831955/using-textautocorrect-and-textautocomplete-together-in-android

Apparently textAutoCorrect and textAutoComplete are mutually exclusive
and textAutoComplete takes precedence. Turns out, textAutoComplete
doesn't get us much of anything unless we want to add a custom glossary
for completion choices. textAutoCorrect gives us auto correction and
"double space to period space" that is really useful.

Note: This is now the same as the step title with "textMultiLine"
rather than "textShortMessage". Also, I removed "text" because
"textMultiLine" implies "text".