Improved algorithmic complexity of format-children.
Improved algorithmic complexity of format-children.

Modified window-clear (does it do the right thing now?).

Simplified window-viewport-position.

antifuchs/mcclim,antifuchs/mcclim,slyrus/mcclim,onixie/mcclim,swflint/McCLIM,slyrus/mcclim,onixie/mcclim,swflint/McCLIM,onixie/mcclim,swflint/McCLIM