Currently, the caret in cursor mode is always hide after scrolling. I
think it's better to restore its appearance if it's logically visible
before scrolling. That is:
1) If the caret is logically visible (Normal or NormalNotShown) before
scrolling, update carets on scroll-end to show the caret again.
2) If the caret is hide due to timeout or blur, it should remain hidden
on scroll-end.
--HG--
extra : transplant_source : %40%2C%95%CB%EDzt%FB%F0CpK%C94TN2%27%2A%A3
05c6b15904