Write and close apply promptly to the pointed-to window
Automatically zerox a window to a default size
Regain a bit of margin between text and the scroll bar
Constant initial height of the command window
Automatically shape newly open flayers.
Export dot through the environment var %dot
Share snarf buffer with rio; a huge hack, but it works.
Import from 9front hg rev. 7469:28fb262886c3