Toolbar setup dialog

[Igor Korot <ikorot01 gmail com>]

Hi, list,
On both Windows and OSX it is possible to have a standard
platform-dependent toolbar
setup dialog with the appropriate API. The dialog will allo to
add/remove the tool button
and re-arrange them.

Is there such a dialog for GtkToolbar? Or I will have to create one myself?
Is there a plan to make one and put it in the library?

Thank you.