Improve error handling in window.cxx
Fixes to vt-state-machine (including tmux crash fix '>4;1m')
Limit scrolling to margin size.
Pass priv character to machineCsi()
Call processOsc on ESC to make ST cause execution.
Moved TTY tracing into state machine (and some cleanups).
Separate icon name and window title control functions.
Pass the priv char to processModes()
Pass the intermediates to machineCsi()
Report Cursor Position does not consider Origin Mode.
Add missing 'break' statement.
Respond to queries immediately.
Support querying the display.
Change minimum size hint of window.
Re-flow seems stable again. Re-enabled it.