Single line mode keybindings

[naens]

When in input field mode and in normal mode, keybindings are different:

^Y deletes the entire text.
^Q goes to the beginning of the text.
^W goes to the end of text.
There are no scroll and page keybindings.
^Q is no more a prefix: other keybindings for delete line from and to the cursor are needed (for example, ^O and ^I).

If the input becomes multi-lined (for example on ^K-M, ^K-N, or ^K-R), the mode switches automatically to edit (it doesn't do the same thing in the opposite direction).