Add support for double height characters (as supported in VTE100 etc)
@stuaxo1
Submitted by Stuart Axon Link to original bug (#587049)
Description
http://www.comptechdoc.org/os/linux/howlinuxworks/linux_hlvt100.html
Physical text terminals support double height characters, and it's actually pretty cool. Text mode terminal emulators on PCs couldn't do this, but there's no reason graphical terminal emulators such as VTE shoudnt be able to do this.
Double height really means being able to display the top or bottom of a double height character in a character cell.
Version: 0.20.x