kcm/kwinrules: Update values on text edit
Previously the text values were updated to the model after
onEditingFinished(), that is after losing focus, to prevent
erroneus updates.
This was making also the needsSaving signal fire only after
a focus change, which is not consistent with the behavior of
other KCMs.
Use onTextEdit() instead, so the model is updated as the user
types.
| BEFORE | AFTER |
|---|---|
| edit_after_focus | edit_fast |