it could help toadd builtin "Recall" message to all Windows created by "New Window" following @thomasz wish.
Most of it is already available: The Recall Script by @MikeD_Anderson :
Recall Function Library
Further on:
If Jmp provides an official way to store GUI settings, the settings could be accessed
1) either to fill the Gui again - via a Recall button
2) to run the Add-In action directly - just piping the settings from the Associative Array of the Recall function to the Add-In.
And an autorun=0/1 flag could control if 1) or 2):
1) default: autorun=0;
run the add-in -> GUI (with a Recall button)
2) first set autorun-flag=1 in the Namespace of the add-in
run the add-in -> no GUI needs to be opened -> the action is directly executed, taking the settings from the stored Recall values
Last step: add a history to the Recall function:
Recall: add a history functionality