vt newcons mouse paste issue FIXED

Hi All

About this anoying paste error we still have in vt console, I looked it up and couldnt find any fix regarding this, so i did it.

Please find attached the fixed version of /usr/src/sys/dev/vt/vt_buf.c with trim spaces and aligned to the console size.
I've tested with other fonts and looks fine in here.

I hope this can help other ppl which finds this 
terminal mouse paste issue a pain in the neck.

thanks

--tzk