empty input queue as soon as

.. the current value cannot be prefix of any bound
keysequence. fixes #547
Merge branch '0.3.3-fix-544'
Merge branch '0.3.3-fix-nowait-547'
don't mention that first run creates default config

because it doesn't any more..
close #552
Merge branch '0.3.3-fix-docs-552' into testing