Use some standard actions for save, next page, previous page, rename.
Add "Save" action to menu and toolbar, otherwise it's not even clear how to save the note.
Don't use `QInputDialog` when renaming, just trigger inline rename.
Also, perform save procedure on quit (inside `KJotsWidget::queryClose`).
TODO: this is not yet functional, need to perform a synchronous job and wait for result.
CCBUG: 255998
CCBUG: 296242