Handle correctly Project Panel dockable window, make it persistent.

[piXelicidio]

Solve one instance window: See Macroscript isChecked and CloseDialogs. See Macroscript scope.
-- ^- Maybe the trick to toggle dialogBar is Visible true/false. test.

Objective: Save and restore state when 3ds Max starts. Keep one instance, unless code rebuild. Add settings to make the auto-restart optional.

[piXelicidio]

Legal way of toggling a window using MacroScript:
https://gist.github.com/piXelicidio/c41cf02f56f59f8c982824fcae84f410

[piXelicidio]

Test how to behave as StartUp script, start with max, register Macroscript and run first time, restore dockable state.