fix segv on word set search
re-fix wrodsep to work again and not segv
miniview: scroll position indicator when jump on change isn't checked.

Summary:
Fix indicators position when your are at some place in scrollback
and terminal outputs some new lines (say from a running command). It
now scrolls to where it should be.

Reviewers: billiob

Differential Revision: https://phab.enlightenment.org/D1335
termio: add Shift + Up/Down shortcut for +1/-1 line scroll navigation

Reviewers: billiob

Differential Revision: https://phab.enlightenment.org/D1336