Updated for the OnChangeCallback signature change.
Set blink to false so cursor seems more responsive

Setting blink to false here makes the cursor seem much more responsive.
With blink set to true, the cursor disappears immediately following a
motion command and only reappears during the next `blink_phase` timeout.

This small change just makes the cursor not disappear, thus providing a
better editing experience with more immediate movement feedback.
Merge pull request #178 from Dparker1990/responsive_cursor

Set blink to false so cursor seems more responsive