#1 please support setting the "title"

[Josh Osborne]

xterm & Apple's Terminal use this sequence:

ESC]2;title-here^G

(ESC being the escape char, and ^G being control G)

to set the tile bar. I think a real vt102 uses it to set the "status
line". It would be nice if WidgetTerm would display this string on
it's little bar next to the red or green light.