More curses theme tweaks
Sprinkle SimpleListWalker constructions to avoid deprecation warnings because of https://github.com/wardi/urwid/issues/37
PEP8 ui_tools
Kill some more ListWalker warnings, see e234fa2857
Don't silence warnings in event loop
Better structure for classic theme
Better structure for theme module
Rename bp_star attr to breakpoint marker
First cut of inline shell