Separate Form() layout; temporarily remove section (group box) stuff
Reimplement form sections
Factor out TreeBase() class from List()
Tree() class
Selectively expand full-width form rows
Resize flag for bottom-right element
Escape to close dialog; buttons for default and close actions
shorthand.itemkey() for dict() sorting key function
Convert column and heading values to sequences
Simplify repr(Select())
Allow weak methods to be wrapped
Allow timers left running to be destoyed; clean up timer in cares.resolve()
Warn about threads left running at destruction
API renames and documentation
shorthand.bitmask()
Allowing non-empty default lists is more noisy than useful
Quick docstrings and comments
Show prefix that works for parameters beginning with an underscore
Use figure space width as unit rather than em

Width of em space would be odd for monospace fonts.
Allow column widths to be specified