vt 3 clicks paste

[tezeka_hotmail.com]

we have two changes in this patch.

first one is regarding the 3 clicks paste.
vtbuf_extract_marked() gains a new arg
int mark

the second change is not much of a change because i had to mess up the
case VT_MOUSE_EXTENDBUTTON:

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

ive replaced
mark = VTB_MARK_EXTEND;
with
mark = VTB_MARK_START

[• hselasky]

Please remove all comments, //'s you've added containing old code.

[tezeka_hotmail.com]

revoved the //'s old code comented as Hans requested

[• hselasky]

Looks good. I'll get this upstream and tested, possibly with some minor modifications.