Is it possible to create a button
whose action is
"save as... in menu bar" with custom initial full path.
(custom initial full path is specified by user.)
Note that if you click save as... in menu bar, a windows pops up suggesting certain full path. That full path is initial full path. If you click save immediately, then the notebook is saved on the initial full path. But if you want to change the path, you can type another full path and click yes. In this sense,
save as... in menu bar is interactive.
So I want to create a save as button, that is interactive,
with custom initial full path,
on a certain notebook.
