DataGrid should always fire editor close event

[Flaurite]

Description

Current behavior splits OK and CANCEL button actions on the following events:

• OK: PreCommit, PostCommit (close event is not fired)
• CANCEL: EditorClose

But in fact, PostCommit and EditorClose are not equivalent events:

• when PostCommit is fired the Editor still opened;
• when EditorClose is fired the Editor has already closed.

Sometimes it needs to have a hook when the entity is committed and the editor is closed.

---

Breaking changes

Inline editor always fires EditorClose event. To check with which action editor is closed use isCancelled() method.
For instance:

dataGrid.addEditorCloseListener(closeEvent -> {
    if (closeEvent.isCancelled()) {
        // closed by Cancel button
    } else {
        // closed by OK button
    }
});

For QA

Check that CloseEvent is fired for OK and Cancel button