patches for abicocoa

-Remove a couple of useless duplicate screen redraw
-Fix the horizontal ruler "smudge" ( resize the window small enough to
have a horizontal scrollbar and move the thumb around a little )
-Fix the vertical ruler corruption that happened sometimes when
resizing the window ( usually when almost fullscreen )

if someone could apply these and tell me if it work ok, I hope I didn't
forget a file or anything, i'm kind of new to participating in open
source project