- we run the action passed to mkXPrompt only if we have a command;
- updateWindows must call destroyComplWin if there are no completions;
- some comments (more to come)
- a shorthand in keyPressHandle
- removed all warnings
This is a long patch the brings us a real prompt, more or less: completions
now work. Added history support, with a configuration option: defaul history
size is 256.
defaultPromptConfig is now deprecated: please use defaultXPConfig instead