Unit Tests Skipped
we have two changes in this patch.
first one is regarding the 3 clicks paste.
vtbuf_extract_marked() gains a new arg
the second change is not much of a change because i had to mess up the
this change is regarding the highlight mark that doesnt disappear from the screen after you paste it. the highlight mark stays forever
below solves the problem
mark = VTB_MARK_EXTEND;
mark = VTB_MARK_START