Move the drag threshold to the right a little. Issue 2663
Merge branch 'master' of https://github.com/gnachman/iTerm2
Merge commit 'a0fa23a1025b6c3e2a4248c5bdcd3554446e34f4'

* commit 'a0fa23a1025b6c3e2a4248c5bdcd3554446e34f4':
  Move the drag threshold to the right a little. Issue 2663