Minor change to change note type feature
Only enable remapping of fields in NoteEditor when more than 2 fields in original note
Remove preview function from note editor
Preview doesn't work when content of notes is modified, therefore it doesn't belong in the NoteEditor. Preview functionality can still be accessed by long-tapping on a card from the browser.
Merge pull request #653 from timrae/noteEditorSmallChanges

Note editor small changes