Fix PCrudFilterPane generating illegal queries when using the "not like" and "not between" operators.

Make the window remember the user-input value even when changing the operator.

[LFW: whitespace fixes - the original commit had real tabs, which we avoid
in some files, including .js ones.]

Signed-off-by: Pasi Kallinen <pasi.kallinen@pttk.fi>
Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>