Input untranslated ascii directly when panel is empty
Input untranslated ascii directly when panel is empty

Some applications only accept directly input ascii as command input.
Character fed through xim commit will not work as intent.

When there were no candidates, we treated all the un-translated
(b/w half/full width) ascii chars as direct input chars.

kaio/ibus-table,mike-fabian/ibus-table,kaio/ibus-table,mike-fabian/ibus-table